Ships

Abstract

To provide a ship capable of improving damage recoverability to the hull by reducing the number of compartments flooded during the damage.SOLUTION: A ship comprises a hull with a pair of right and left broadsides, a bulkhead deck dividing the inner part of the hull into a lower space and an upper space, a first transverse mounting bulkhead dividing a room by arranging its pair at an interval in the stern direction in the lower space, a side casing arranged along the broadside right above the room in the upper space and to form a watertight compartment in its inside communicating with the room via an opening formed on the bulkhead deck, and a pair of flooding prevention walls extending upward from the bulkhead deck and provided over the width direction of the watertight compartment in the side casing inside on both sides of the bow side and of the stern side in the watertight compartment of the side casing inside.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a ship.

Background Art

[0002] Patent Document 1 discloses a ship such as a ferry, a RORO (Roll-on / Roll-off ship), or a PCTC (Pure Car & Truck Carrier), which includes a plurality of compartments provided below the bulkhead deck of the hull and has side casings that straddle the openings formed in the upper portions of these compartments. In this Patent Document 1, a water immersion prevention wall is provided to separate each opening so that water does not flow from the opening of an immersed compartment through the opening into the opening of a non-immersed compartment.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a ship as described above, due to the amendment of the SOLAS Convention in 2020, the safety level at the time of damage has been enhanced, and measures to ensure the recovery performance at the time of damage are required. However, in the ship of Patent Document 1, there is a problem that if a position straddling a plurality of compartments is damaged, depending on the damaged portion, a plurality of large compartments may be simultaneously immersed, making it difficult to establish the recoverability of the entire ship. The present disclosure has been made in view of the above circumstances, and provides a ship capable of reducing the number of compartments immersed at the time of damage and improving the recoverability at the time of damage.

Means for Solving the Problems

[0005] To solve the above problems, the following configuration is adopted. According to a first aspect of the present disclosure, a vessel comprises a hull having a pair of left and right sides, a bulkhead deck dividing the hull into a lower space and an upper space, a pair of first transverse bulkheads arranged in the lower space at intervals in the bow-stern direction to partition a room, a side casing positioned along the side directly above the room in the upper space and forming a watertight compartment that communicates with the room through an opening formed in the bulkhead deck, and a pair of floodproof walls provided on both the bow and stern sides of the opening in the watertight compartment inside the side casing, extending upward from the bulkhead deck and spanning the width of the watertight compartment inside the side casing. The room comprises a first flood-prevention room, which is a watertight compartment located adjacent to the first transverse bulkhead and the side of the ship at the bow, and a second flood-prevention room, which is a watertight compartment located adjacent to the first transverse bulkhead and the side of the ship at the stern. The flood-prevention wall is located between the first flood-prevention room and the opening, and between the second flood-prevention room and the opening, in the bow-stern direction.

[0006] According to a second aspect of the present disclosure, the vessel comprises a hull having a pair of left and right sides, a bulkhead deck dividing the hull into a lower space and an upper space, a pair of first transverse bulkheads arranged in the lower space at intervals in the bow-stern direction to partition a room, and side casings arranged along the sides directly above the room in the upper space to form a watertight compartment on the inside, wherein the forward wall of the bow side forming the side casing is located further forward than the first transverse bulkhead on the bow side, and the aft wall of the stern side forming the side casing is located further aft than the first transverse bulkhead on the stern side. [Effects of the Invention]

[0007] According to this disclosure, it is possible to reduce the number of compartments that become flooded when damaged, thereby improving the resilience in the event of damage. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram showing the general configuration of a vessel in the first embodiment of this disclosure. [Figure 2] This is a plan view showing the schematic configuration of the floor below the bulkhead deck in the first embodiment of the present disclosure. [Figure 3] This is a plan view showing the configuration on the bulkhead deck in the first embodiment of the present disclosure. [Figure 4]This is a plan view showing the lower part of the side casing in the first embodiment of the present disclosure. [Figure 5] This is a side view of the side casing shown above. [Figure 6] This is a cross-sectional view of the vessel in the second embodiment of this disclosure, corresponding to Figure 4. [Figure 7] This figure corresponds to Figure 4 in a modified example of the first embodiment of the present disclosure. [Figure 8] This figure corresponds to Figure 6 in the first modified example of the second embodiment of the present disclosure. [Figure 9] This figure corresponds to Figure 6 in the second modified example of the second embodiment of the present disclosure. [Modes for carrying out the invention]

[0009] Next, a vessel in an embodiment of this disclosure will be described based on the drawings. <First Embodiment> Figure 1 is a schematic diagram showing the general configuration of a vessel in the first embodiment of this disclosure. As shown in Figure 1, the vessel 1 of the first embodiment comprises at least a hull 2, a bulkhead deck 11, a first transverse bulkhead 21A, a second transverse bulkhead 21B, a first flood prevention chamber 25A, a second flood prevention chamber 25B, a side casing 30A, and a flood prevention wall 50. The vessel 1 illustrated in this embodiment is a vehicle carrier (ferry) capable of transporting vehicles.

[0010] <hull> The hull 2 ​​has sides 3A and 3B and a bottom 4. The sides 3A and 3B each have a pair of side plates forming the left and right sides, respectively. The bottom 4 has a bottom plate connecting these sides 3A and 3B. The hull 2 ​​has a U-shaped cross-section due to these pairs of sides 3A and 3B and the bottom 4. The bottom 4 in this embodiment has a double bottom structure and has an inner bottom plate 18 inside the bottom plate.

[0011] The hull 2 ​​is equipped with a forward rampway 7A and a stern rampway 7B for loading (rolling on) or unloading (rolling off) vehicles into the hull 2. The forward rampway 7A is located on the starboard side of the bow 2F. The stern rampway 7B is located on the starboard side of the stern 2A. Both the forward rampway 7A and the stern rampway 7B are retractable and can be rolled outwards from the hull 2 ​​to allow vehicles to travel on or off the hull 2.

[0012] Inside the hull 2, there is a bulkhead deck 11 that extends horizontally. The bulkhead deck 11 is both a boarding deck and a freeboard deck. Furthermore, the bulkhead deck 11 in this embodiment is a full-length deck. The bulkhead deck 11 divides the interior of the hull 2 ​​into an upper space 40 (see Figure 4) and a lower space 41 (see Figure 4). Vehicles can board the bulkhead deck 11 through the deployed forward rampway 7A and aft rampway 7B. Inside the hull 2, above the bulkhead deck 11, there are multiple decks 12, 13, 14, 15, and 16. In this embodiment, a ramp (not shown) on which vehicles can travel is provided between the bulkhead deck 11 and the upper deck 12.

[0013] Figure 2 is a plan view showing the schematic configuration of the floor below the bulkhead deck in the first embodiment of the present disclosure. As shown in Figure 2, the hull 2 ​​of this embodiment is equipped with longitudinal bulkheads 19A and 19B in the area between the bulkhead deck 11 and the inner bottom plate 18, on the side closer to the bow 2F. The longitudinal bulkheads 19A and 19B are spaced apart from the sides 3A and 3B, on the inside of the hull 2 ​​in the width direction Dw.

[0014] Inside the hull 2, a plurality of bulkheads 20 are provided. These plurality of bulkheads 20 are watertight bulkheads extending in the ship width direction Dw. The plurality of bulkheads 20 are provided between the bow bulkhead 19 and the first transverse bulkhead 21A on the bow 2F side described later, and are arranged at intervals in the ship length direction Da. These plurality of bulkheads 20 are formed so as to respectively span between the left side 3A and the right side 3B, between the left side 3A and the longitudinal through bulkhead 19A, and between the right side 3B and the longitudinal through bulkhead 19B. And, by these bulkheads 20, the space between the bulkhead deck 11 and the inner bottom plate 18 on the bow 2F side than the first transverse bulkhead 21A on the bow 2F side described later is partitioned into a plurality of watertight compartments S1 to S7. These watertight compartments S1 to S7 can be used, for example, as void spaces, fuel tanks, ballast tanks, various equipment rooms, warehouses, cargo holds, fresh water tanks, sewage treatment spaces, fin stabilizer spaces, etc.

[0015] <The First Transverse Bulkhead and the Second Transverse Bulkhead> Inside the hull 2, a plurality of transverse bulkheads 21 are provided at intervals in the ship length direction Da on the stern 2A side of the longitudinal through bulkheads 19A and 19B. Each transverse bulkhead 21 is a watertight bulkhead, is provided between the bulkhead deck 11 and the inner bottom plate 18, and is provided so as to connect the left side 3A and the right side 3B. In the present embodiment, as the plurality of transverse bulkheads 21, at least two first transverse bulkheads 21A and one second transverse bulkhead 21B are provided.

[0016] The plurality of transverse bulkheads 21, together with the left side 3A, the right side 3B, the bulkhead deck 11, and the inner bottom plate 18, at least partition the watertight compartments (rooms) S11 and S12. In the present embodiment, among the watertight compartments S11 and S12, the watertight compartment S11 close to the bow 2F is a auxiliary machinery room for housing generators and the like. Also in the present embodiment, the watertight compartment S12 adjacent to the stern 2A side of the watertight compartment S11 is a main engine room for housing the main engine. Further, in the present embodiment, the transverse bulkhead 21 on the bow 2F side of the watertight compartment S11 and the transverse bulkhead 21 on the stern 2A side of the watertight compartment S12 are referred to as the first transverse bulkhead 21A, and the transverse bulkhead 21 partitioning between the watertight compartment S11 and the watertight compartment S12 is referred to as the second transverse bulkhead 21B.

[0017] In this embodiment, the watertight compartment S13 adjacent to the stern 2A side of the watertight compartment S12 is a shaft room housing the rotating shaft 9 that connects the main engine and the propeller 5. Furthermore, in this embodiment, a watertight compartment S14, which is a void space or the like, is provided further stern 2A than the watertight compartment S13, and a watertight compartment S15, which is a steering gear room, is provided adjacent to the stern 2A side of the watertight compartment S14.

[0018] <Flood prevention room> The vessel 1 is equipped with multiple flood-proof rooms 25. In this embodiment, the multiple flood-proof rooms 25 include a first flood-proof room 25A, a second flood-proof room 25B, and a third flood-proof room 25C. The first flood-proof room 25A is located in a watertight compartment S11, and the second flood-proof room 25B is located in a watertight compartment S12. The first flood-proof room 25A is a watertight compartment located adjacent to the first transverse bulkhead 21A on the bow 2F side and the sides 3A and 3B. The second flood-proof room 25B is a watertight compartment located adjacent to the first transverse bulkhead 21A on the stern 2A side and the sides 3A and 3B. The watertight compartment S11 illustrated in this embodiment also includes a third flood-proof room 25C. The third flood prevention chamber 25C is a watertight compartment located adjacent to the second transverse bulkhead 21B and the hull sides 3A and 3B.

[0019] The first flood prevention chamber 25A, the second flood prevention chamber 25B, and the third flood prevention chamber 25C all extend in the vertical direction Dv from the bottom of the hull 4 to the bulkhead deck 11. In this embodiment, the first flood prevention chamber 25A, the second flood prevention chamber 25B, and the third flood prevention chamber 25C are cylindrical in shape in plan view, surrounded on all four sides by the hull sides 3A, 3B, the transverse bulkhead 21, the transverse wall 26A, and the inner wall 27B. The length Da in the bow-stern direction of the first flood prevention chamber 25A, the second flood prevention chamber 25B, and the third flood prevention chamber 25C is longer than the expected damage length, and is 3% or more of Ls. For example, in the case of a vessel with Ls of 200m, the length Da in the bow-stern direction of the first flood prevention chamber 25A, the second flood prevention chamber 25B, and the third flood prevention chamber 25C will be 6m or more. Here, Ls refers to the length of the ship for each compartment, and is the mold length between the forward and aft ends of the hull below the deck that limits the vertical flooding range at the highest compartment draft. The unit of Ls is meters. Furthermore, the length Da in the bow-stern direction of each flood prevention chamber 25 is the length Da in the bow-stern direction from the adjacent transverse bulkhead 21 to the flood prevention chamber 25.

[0020] By providing the first flood prevention chamber 25A, even if the sides 3A and 3B are damaged near the boundary between watertight compartment S7 and watertight compartment S11, the damage will extend across watertight compartment S7 and the first flood prevention chamber 25A, or between watertight compartment S11 and the first flood prevention chamber 25A, thus preventing flooding in both watertight compartment S7 and watertight compartment S11. Similarly, by providing the second flood prevention chamber 25B, even if the sides 3A and 3B are damaged near the boundary between watertight compartment S13 and watertight compartment S12, the damage will extend across watertight compartment S13 and the second flood prevention chamber 25B, or between watertight compartment S12 and the second flood prevention chamber 25B, thus preventing flooding in both watertight compartment S13 and watertight compartment S12. Furthermore, by providing a third flood prevention chamber 25C, even if the hull sides 3A and 3B are damaged near the boundary between watertight compartment S11 and watertight compartment S12, the damage will extend across watertight compartment S11 and the third flood prevention chamber 25C, or between watertight compartment S12 and the third flood prevention chamber 25C, thus preventing flooding in both watertight compartment S11 and watertight compartment S12. Although the explanation described the case where the third flood prevention chamber 25C is provided in watertight compartment S12, the third flood prevention chamber 25C may also be provided in watertight compartment S11 or omitted altogether.

[0021] <Side casing> As shown in Figure 1, the side casing 30A extends upward from the bulkhead deck 11. The side casing 30A forms a watertight compartment for guiding exhaust pipes (not shown) from the main engine and generators to the funnel 8. The side casing 30A is cylindrical and continuous in the vertical direction Dv. The side casing 30A is formed to penetrate the decks 12, 13, 14, and 15, respectively. Note that the entire interior of the side casing 30A is not limited to the engine area. For example, it may be used as other compartments except for the part necessary for the engine area.

[0022] Figure 3 is a plan view showing the configuration on the bulkhead deck in the first embodiment of the present disclosure. In this embodiment, the side casing 30A is provided in the upper space 40 above the bulkhead deck 11 and is positioned to straddle the watertight compartment S11, which serves as an auxiliary engine room, and the watertight compartment S12, which serves as the main engine room, which are adjacent to each other in the bow-stern direction Da, with the second transverse bulkhead 21B in between. As shown in Figure 3, in this embodiment, one side casing 30A is provided on the left side 3A and one on the right side 3B. These two side casings 30A are in contact with the left side 3A and the right side 3B, respectively. Since the configuration of these two side casings 30A is basically the same, in the following description, the side casing 30A provided adjacent to the right side 3B will be used as an example.

[0023] Figure 4 is a plan view showing the lower periphery of the side casing in the first embodiment of the present disclosure. Figure 5 is a side view of the side casing. As shown in Figures 4 and 5, the side casing 30A is a cylindrical shape in plan view, roughly rectangular, surrounded on all four sides by the hull sides 3B (3A), the front wall 31A, the rear wall 31B, and the inner wall 31C. The front wall 31A and the rear wall 31B each extend from the hull sides 3B (3A) toward the center in the width direction Dw. In other words, the front wall 31A and the rear wall 31B extend parallel to the transverse bulkhead 21. In this embodiment, the front wall 31A is located directly above the first transverse bulkhead 21A on the bow 2F side, and the rear wall 31B is located directly above the first transverse bulkhead 21A on the stern 2A side.

[0024] The inner wall 31C connects the edge of the fore wall 31A on the central side in the ship's width direction Dw to the edge of the aft wall 31B. In this embodiment, the inner wall 31C is positioned at a certain distance from the side 3B (3A) on the central side in the ship's width direction Dw and is formed almost parallel to the side 3A and 3B.

[0025] <Opening> The bulkhead deck 11 has an opening 22 that connects an upper space 40 located inside the side casing 30A and above the bulkhead deck 11, with a lower space 41 located between the two first transverse bulkheads 21A and below the bulkhead deck 11. Exhaust gas pipes (not shown) for the main engines and generators located in the watertight compartments S11 and S12 are introduced into the side casing 30A through the opening 22 and extend to the funnel 8.

[0026] The bulkhead deck 11 of this embodiment has a first opening 22A that connects the lower space 41 in the watertight compartment S11 with the upper space 40 in the side casing 30A, and a second opening 22B that connects the lower space 41 in the watertight compartment S12 with the upper space 40 in the side casing 30A. The first opening 22A and the second opening 22B illustrated in this embodiment are both formed in the bow-stern direction Da, closer to the second transverse bulkhead 21B than to the first transverse bulkhead 21A. In this embodiment, the case of providing one opening 22 for one watertight compartment is shown, but multiple openings 22 may be provided for one watertight compartment.

[0027] <Flood prevention wall> The flood prevention wall 50 is provided in the upper space 40 within the side casing 30A, which is a watertight compartment. The flood prevention wall 50 is provided on both the bow 2F side and the stern 2A side of the opening 22. In other words, a pair of flood prevention walls 50 are provided spaced apart in the bow-stern direction Da. These pair of flood prevention walls 50 extend upward from the bulkhead deck 11 and are provided within the side casing 30A in the width direction of the side casing 30A (in other words, the ship's width direction Dw). The upper end of the flood prevention wall 50 in this embodiment is located slightly below the position of the deck 12. The position of the upper end of these flood prevention walls 50 may be the position of the deck 12. The flood prevention wall 50 is a watertight bulkhead, and the movement of water in the bow-stern direction Da is restricted as long as the water does not go over the upper end of these flood prevention walls 50. Alternatively, for example, the deck 12 may be extended to the inside of the side casing 30A, and the upper end of the flood prevention wall 50 may be connected to the deck 12.

[0028] In this embodiment, the flood prevention walls 50 are located between the flood prevention chamber 25 and the opening 22 in the bow-stern direction Da. More specifically, of the pair of flood prevention walls 50, the flood prevention wall 50 on the bow 2F side is provided between the first opening 22A and the first flood prevention chamber 25A on the bow 2F side in the bow-stern direction Da. On the other hand, the flood prevention wall 50 on the stern 2A side is provided between the second opening 22B and the second flood prevention chamber 25B on the stern 2A side in the bow-stern direction Da. That is, the flood prevention wall 50 on the bow 2F side is positioned at a distance of 3% or more of LS from the forward wall 31A, and the flood prevention wall 50 on the stern 2A side is positioned at a distance of 3% or more of Ls from the aft wall 31B. In Figure 4, the areas between the opening 22, where a flood prevention wall 50 can be installed, and the flood prevention chamber 25 in the bow-stern direction Da are indicated by areas L1 and L2.

[0029] <Bulkhead> The bulkhead 51 separates the watertight compartment of the side casing 30A in the bow-stern direction Da, separating the first opening 22A and the second opening 22B. The upper end of the flood prevention wall 50 in this embodiment is located slightly below the position of the bulkhead deck 11. This bulkhead 51 is also a watertight bulkhead similar to the flood prevention wall 50 described above, and the movement of water in the bow-stern direction Da is restricted as long as the water does not go over the upper end of the bulkhead 51. The position of the upper end of the bulkhead 51 may be the same as the position of the bulkhead deck 11. The height of the bulkhead 51 can be set according to the amount of inclination in the pitching direction assumed for the vessel 1. By setting it in this way, for example, if either the watertight compartment S11 or the watertight compartment S12 is flooded, even if the ship 1 tilts in the bow-stern direction Da (in other words, the pitching direction), it is possible to prevent water overflowing onto the bulkhead deck 11 from the first opening 22A and the second opening 22B from entering the watertight compartment that is not flooded through the other opening 22B.

[0030] <Effects and Effects> In the first embodiment described above, the vessel includes a side casing 30A positioned along the sides 3A and 3B directly above the watertight compartments S11 and S12 in the upper space 40, forming a watertight compartment on its interior that communicates with the watertight compartments S11 and S12 through an opening 22 formed in the bulkhead deck 11, and a pair of flood prevention walls 50 provided on both the bow 2F side and the stern 2A side of the opening 22 in the watertight compartment inside the side casing 30A, extending upward from the bulkhead deck 11 and spanning the width direction of the watertight compartment inside the side casing 30A. As a result, for example, even if damage occurs at the intersection of the front wall 31A of the side casing 30A and the sides 3A and 3B, water that enters from the damaged area cannot move beyond the flood prevention walls 50 towards the opening 22, thereby suppressing flooding into the watertight compartment S11. Similarly, even if damage occurs at the intersection of the rear wall 31B of the side casing 30A and the side panels 3A and 3B, water entering from the damaged area cannot move beyond the flood prevention wall 50 towards the opening 22, thus suppressing flooding into the watertight compartment S12. Therefore, the number of compartments flooded in the event of damage can be reduced, improving stability in the event of damage.

[0031] In the first embodiment described above, the watertight compartments S11 and S12 further include a first flood prevention compartment 25A, which is a watertight compartment provided adjacent to the first transverse bulkhead 21A located on the bow 2F side and the side panels 3A and 3B, and a second flood prevention compartment 25B, which is a watertight compartment provided adjacent to the first transverse bulkhead 21A located on the stern 2A side and the side panels 3A and 3B. As a result, for example, even if damage occurs at the intersection of the forward wall 31A of the side casing 30A, the bulkhead deck 11, and the first transverse bulkhead 21A on the bow 2F side, the flood prevention wall 50 can suppress flooding into the watertight compartment S11 through the opening 22, and the first flood prevention compartment 25A can also suppress direct flooding into the watertight compartment S11. Similarly, even if damage occurs at the intersection of the rear wall 31B of the side casing 30A, the bulkhead deck 11, and the first transverse bulkhead 21A on the stern side 2A, the flood prevention wall 50 can suppress flooding into the watertight compartment S12 through the opening 22, and the second flood prevention chamber 25B can also suppress direct flooding into the watertight compartment S11.

[0032] In the first embodiment described above, the vessel further includes a second transverse bulkhead 21B that forms a watertight compartment S11 on the bow 2F side and a watertight compartment S12 on the stern 2A side, a first opening 22A that serves as an opening 22 connecting the watertight compartment S11 and the watertight compartment in the side casing 30A, a second opening 22B that serves as an opening 22 connecting the watertight compartment S12 and the watertight compartment in the side casing 30A, and a bulkhead 51 that separates the first opening 22A and the second opening 22B, thereby dividing the watertight compartment in the side casing 30A in the bow-stern direction Da. As a result, for example, even if one of the watertight compartments S11 and S12 is flooded and water moves into the side casing 30A from one of the first openings 22A and the second opening 22B, the bulkhead 51 can prevent the water from moving to the other side of the first opening 22A and the second opening 22B. Therefore, even if one of the watertight compartments S11 or S12 is flooded, it is possible to prevent water from flowing into the other watertight compartment S11 or S12 through the first opening 22A and the second opening 22B.

[0033] In the first embodiment described above, the flood prevention wall 50 is further positioned between the flood prevention chamber 25 and the opening 22 in the bow-stern direction Da. This allows the flood prevention wall 50 to restrict the movement of water toward the opening 22 while also separating it from the front wall 31A and rear wall 31B of the side casing 30A. Therefore, damage to the flood prevention wall 50 can be prevented when damage occurs to the front wall 31A or rear wall 31B.

[0034] In the above embodiment, watertight compartment S11 and watertight compartment S12 are the main engine room or the auxiliary engine room. This prevents the main engine room and the auxiliary engine room from being flooded simultaneously.

[0035] <Second Embodiment> Next, a second embodiment of this disclosure will be described with reference to the drawings. The vessel of this second embodiment is a modified version of the vessel of the first embodiment described above, in which the length of the side casing in the bow-stern direction is changed. For this reason, the same reference numerals are used for the same parts as in the first embodiment described above, and redundant explanations are omitted.

[0036] The vessel 1 in the second embodiment comprises at least a hull 2, a bulkhead deck 11, a first transverse bulkhead 21A, a second transverse bulkhead 21B, a first flood prevention chamber 125A, a second flood prevention chamber 125B, a side casing 130A, and a flood prevention wall 150. The vessel 1 illustrated in this embodiment is a vehicle carrier (ferry) capable of transporting vehicles.

[0037] <Horizontal bulkhead> Figure 6 is a cross-sectional view of the vessel in the second embodiment of this disclosure, corresponding to Figure 4. As shown in Figure 6, in the second embodiment, similar to the first embodiment described above, a plurality of transverse bulkheads 21 are provided in the lower space 41 below the bulkhead deck 11, spaced apart in the bow-stern direction Da. The plurality of transverse bulkheads 21 consist of two first transverse bulkheads 21A and one second transverse bulkhead 21B.

[0038] <Flood prevention room> The vessel 1 of the second embodiment is equipped with a plurality of flood prevention rooms 125, similar to the first embodiment. In this second embodiment, the plurality of flood prevention rooms 125 are a first flood prevention room 125A, a second flood prevention room 125B, and a third flood prevention room 125C. The first flood prevention room 125A is located in the watertight compartment S7, and the second flood prevention room 125B is located in the watertight compartment S13. The first flood prevention room 125A is a watertight compartment located adjacent to the first transverse bulkhead 21A on the bow 2F side and the sides 3A and 3B. The second flood prevention room 125B is a watertight compartment located adjacent to the first transverse bulkhead 21A on the stern 2A side and the sides 3A and 3B. The third flood prevention room 25C exemplified in this second embodiment is located in the watertight compartment S11. The third flood prevention chamber 125C is a watertight compartment located adjacent to the second transverse bulkhead 21B and the hull sides 3A and 3B.

[0039] The first flood prevention chamber 125A, the second flood prevention chamber 125B, and the third flood prevention chamber 125C all extend in the vertical direction Dv from the bottom of the hull 4 to the bulkhead deck 11. The first flood prevention chamber 125A, the second flood prevention chamber 125B, and the third flood prevention chamber 125C in this second embodiment, like the flood prevention chamber 25 in the first embodiment, are cylindrical in shape in plan view, surrounded on all four sides by the hull sides 3A, 3B, the transverse bulkhead 21, the transverse wall 26A, and the inner wall 27B. The length Da in the bow-stern direction of these first flood prevention chambers 125A, the second flood prevention chamber 125B, and the third flood prevention chamber 125C is also longer than the expected damage length, being more than 3% of Ls.

[0040] <Side casing> The side casing 130A extends upward from the bulkhead deck 11. The side casing 130A forms a watertight compartment for guiding exhaust pipes (not shown) of the main engine and generators to the funnel 8. The side casing 130A is cylindrical and continuous in the vertical direction Dv. The side casing 130A is formed to penetrate the decks 12, 13, 14, and 15, respectively.

[0041] The side casing 130A is located in the upper space 40 above the bulkhead deck 11 and is positioned to straddle the watertight compartments S11 and S12, which are adjacent to each other in the bow-stern direction Da, with the second transverse bulkhead 21B in between. In this second embodiment, as in the first embodiment, one side casing 130A is provided on the left side 3A and one on the right side 3B. These two side casings 130A are in contact with the left side 3A and the right side 3B, respectively. Since the configuration of these two side casings 130A is basically the same, the following description will use the side casing 130A provided adjacent to the right side 3B as an example.

[0042] The side casing 130A is a cylindrical shape in plan view, roughly rectangular, surrounded on all four sides by the hull sides 3B (3A), the fore wall 131A, the aft wall 131B, and the inner wall 131C. The fore wall 131A and the aft wall 131B each extend from the hull sides 3B (3A) toward the center in the width direction Dw. In other words, the fore wall 131A and the aft wall 131B extend parallel to the transverse bulkhead 21. In this embodiment, the fore wall 131A is located further toward the bow 2F than the first transverse bulkhead 21A on the bow 2F side. In this embodiment, the aft wall 131B is located further toward the stern 2A than the first transverse bulkhead 21A on the stern 2A side. The distance between the first transverse bulkhead 21A on the bow 2F side and the front wall 131A in the bow-stern direction Da, and the distance between the first transverse bulkhead 21A on the stern 2A side and the aft wall 131B are both 3% or more of Ls. The inner wall 131C connects the edge of the front wall 131A on the central side in the width direction Dw to the edge of the aft wall 131B, similar to the inner wall 31C of the first embodiment.

[0043] <Opening> The bulkhead deck 11 has an opening 22 that connects an upper space 40 located inside the side casing 130A and above the bulkhead deck 11, with a lower space 41 located between the two first transverse bulkheads 21A and below the bulkhead deck 11. Exhaust gas pipes (not shown) for the main engines and generators located in the watertight compartments S11 and S12 are introduced into the side casing 130A through the opening 22 and extend to the funnel 8.

[0044] The bulkhead deck 11 of the second embodiment has, similar to the first embodiment, a first opening 22A and a second opening 22B as openings 22. Although the example shows one opening 22 for one watertight compartment, multiple openings 22 may be provided for one watertight compartment.

[0045] <Flood prevention wall> The flood prevention wall 150, like the flood prevention wall 50 in the first embodiment, is provided in the upper space 40 within the watertight compartment, the side casing 130A. The flood prevention wall 150 is provided on both the bow 2F side and the stern 2A side of the opening 22. In other words, a pair of flood prevention walls 150 are provided spaced apart in the bow-stern direction Da.

[0046] A pair of floodproof walls 150 extend upward from the bulkhead deck 11 and are provided within the side casing 130A in the width direction of the side casing 130A (in other words, in the ship's width direction Dw). In the second embodiment, the upper ends of the floodproof walls 150 are located slightly below the position of the bulkhead deck 11. The position of the upper ends of these floodproof walls 150 may be the same as the position of the bulkhead deck 11. The floodproof walls 150 are watertight bulkheads, and the movement of water in the bow-stern direction Da is restricted as long as it does not go over the upper ends of these floodproof walls 150.

[0047] In the second embodiment, the flood prevention wall 150 is located between the flood prevention chamber 125 and the opening 22 in the bow-stern direction Da. In other words, the flood prevention wall 150 is provided between the first transverse bulkhead 21A and the first opening 22A on the bow 2F side and between the first transverse bulkhead 21A and the second opening 22B on the stern 2A side, respectively, in the bow-stern direction Da. That is, the flood prevention wall 150 on the bow 2F side is positioned at a distance of 3% or more of LS from the forward wall 131A, and the flood prevention wall 150 on the stern 2A side is positioned at a distance of 3% or more of LS from the aft wall 131B. In Figure 5, the regions between the opening 22 and the flood prevention chamber 125 in the bow-stern direction Da where the flood prevention wall 150 can be provided are indicated by regions L3 and L4.

[0048] <Bulkhead> The bulkhead 51 divides the watertight compartment of the side casing 130A in the bow-stern direction Da, separating the first opening 22A and the second opening 22B. The bulkhead 51 of the second embodiment has the same configuration as the first embodiment, so a detailed explanation is omitted.

[0049] <Effects and Effects> In the second embodiment described above, the forward wall 131A on the bow 2F side that forms the side casing 130A is located further towards the bow 2F than the first transverse bulkhead 21A on the bow 2F side. Furthermore, the aft wall 131B on the stern 2A side that forms the side casing 130A is located further towards the stern 2A than the first transverse bulkhead 21A on the stern 2A side. As a result, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the bow 2F side, and the sides 3A and 3B, the forward wall 131A of the side casing 130A will not be damaged, thus suppressing flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck. Similarly, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the stern side 2A, and the sides 3A and 3B, the aft wall 131B of the side casing 130A will not be damaged, thus preventing flooding of the vehicle loading space on the bulkhead deck 11.

[0050] In the second embodiment described above, the side casing 130A further forms a watertight compartment that communicates with the watertight compartments S11 and S12 via an opening 22 formed in the bulkhead deck 11. Furthermore, a pair of flood prevention walls 150 are provided on both the bow 2F side and the stern 2A side of the opening 22 in the watertight compartment inside the side casing 130A, and at a position closer to the opening 22 than the pair of first transverse bulkheads 21A, extending upward from the bulkhead deck 11 and spanning the width direction of the watertight compartment inside the side casing 130A. As a result, even if damage occurs at the intersection of the bulkhead deck 11, the forewall 131A, and the sides 3A and 3B, the flood prevention walls 150 can prevent water from moving towards the first opening 22A inside the side casing 130A. Consequently, flooding of the watertight compartment S11 through the first opening 22A can be suppressed. Similarly, even if damage occurs at the intersection of the bulkhead deck 11, the aft wall 131B, and the sides 3A and 3B, the flood prevention wall 150 can prevent water from moving towards the second opening 22B in the side casing 130A. As a result, flooding of the watertight compartment S12 through the second opening 22B can be suppressed. Furthermore, since the bulkhead 51 is provided, similar to the first embodiment, even if one of the watertight compartments S11 and S12 is flooded, water can be prevented from flowing into the other watertight compartment S11 and S12 through the first opening 22A and the second opening 22B.

[0051] In the second embodiment described above, the vessel is further equipped with a first flood prevention chamber 125A, which is a watertight compartment located on the bow 2F side, adjacent to the first transverse bulkhead 21A and the sides 3A and 3B, and positioned further forward on the bow 2F side than the first transverse bulkhead 21A on the bow 2F side, and a second flood prevention chamber 125B, which is a watertight compartment located on the stern 2A side, adjacent to the first transverse bulkhead 21A and the sides 3A and 3B, and positioned further forward on the stern 2A side than the first transverse bulkhead 21A on the stern 2A side. This makes it possible to suppress flooding of the watertight compartment S7 adjacent to the bow 2F side of the watertight compartment S11 in the event of damage to the intersection of the bulkhead deck 11, the forewall 131A, and the sides 3A and 3B. Similarly, if damage occurs at the intersection of the bulkhead deck 11, the aft wall 131B, and the hull sides 3A and 3B, flooding of the watertight compartment S13, which is the shaft room adjacent to the stern side 2A of the watertight compartment S12, can be suppressed. As a result, the number of compartments that are flooded can be reduced.

[0052] <Modification of the first embodiment> Figure 7 is a diagram corresponding to Figure 4 in a modified example of the first embodiment of the present disclosure. In the first embodiment of this disclosure, a case was described in which a side casing 30A is formed spanning two watertight compartments S11 and S12 adjacent to each other in the bow-stern direction Da in a plan view. However, the side casing is not limited to being formed spanning multiple watertight compartments. For example, as shown in Figure 7, the side casing 30B may be positioned along the sides 3A and 3B directly above one watertight compartment S112.

[0053] In this modified version of the first embodiment, the front wall 31A of the side casing 30B is positioned directly above the first transverse bulkhead 21A on the bow 2F side, and the rear wall 31B of the side casing 30B is positioned directly above the first transverse bulkhead 21A on the stern 2A side. The pair of flood prevention walls 50 are provided on both the bow 2F side and the stern 2A side of the opening 22, extending upward from the bulkhead deck 11 and spanning the width of the watertight compartment inside the side casing 30B. These first transverse bulkheads 21A are positioned in the regions L1 and L2, respectively, between the opening 22 in the bow-stern direction Da and the flood prevention chamber 25 provided in the watertight compartment S112, similar to the first embodiment.

[0054] With this configuration, for example, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the bow 2F side, the forward wall 31A, and the side walls 3A and 3B, the flooding prevention wall 50 and the first flooding prevention chamber 25A can suppress flooding into the watertight compartment S112. Similarly, Flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck, can be suppressed. Similarly, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the stern side 2A, the aft wall 31B, and the side walls 3A, 3B, flooding of the watertight compartment S112 can be suppressed by the flood prevention wall 50 and the second flood prevention chamber 25B.

[0055] <First modified example of the second embodiment> Figure 8 is a diagram corresponding to Figure 6 in the first modified example of the second embodiment of this disclosure. In the second embodiment of this disclosure, similar to the first embodiment, a case has been described in which the side casing 130A is formed spanning two watertight compartments S11 and S12 adjacent to each other in the bow-stern direction Da in a plan view. However, the side casing is not limited to being formed spanning multiple watertight compartments. For example, as in the side casing 130B of the first modification of the second embodiment shown in Figure 8, it may be arranged along the sides 3A and 3B directly above one watertight compartment S112. The configuration of the watertight compartment S112 and the opening 22 is the same as the modification of the first embodiment described above, so a detailed description is omitted.

[0056] With this configuration, even if damage occurs at the intersection of the forward wall 131A or aft wall 131B with the bulkhead deck 11 and the hull sides 3A and 3B, the flood prevention wall 150 can prevent water from entering the watertight compartment S112 through the opening 22.

[0057] <Second modified example of the second embodiment> Figure 9 is a diagram corresponding to Figure 6 in a second modified example of the second embodiment of the present disclosure. In the first modification of the second embodiment, the case in which an opening 22, a flood-proof wall 150, and a flood-proof chamber 125 are provided was described. However, these opening 22, flood-proof wall 150, and flood-proof chamber 125 may be provided as appropriate, and for example, as in the side casing 230B of the second modification of the second embodiment shown in Figure 9, the opening 22, flood-proof wall 150, and flood-proof chamber 125 may not be provided. Also, if the side casing 230B is not a so-called engine casing that guides exhaust gas pipes (not shown), the side casing 230B may be formed in the range from the bulkhead deck 11 to the deck 12. In other words, the side casing 230B may not be formed on a level above the deck 12.

[0058] By configuring the side casing 230B as in the second modification of this second embodiment, even if the intersection of the bulkhead deck 11, the first transverse bulkhead 21A, and the sides 3A, 3B is damaged, flooding of the area around the side casing 230B, i.e., the large compartment on the bulkhead deck 11 which is the boarding deck, can be suppressed. Furthermore, even if the intersection of the bulkhead deck 11, the forward wall 131A, and the sides 3A, 3B, or the intersection of the bulkhead deck 11, the aft wall 131B, and the sides 3A, 3B is damaged, the watertight compartment S112 can be prevented from flooding, thus suppressing simultaneous flooding of four or more compartments.

[0059] <Other Embodiments> This disclosure is not limited to the configurations of the embodiments described above, and design modifications are possible without departing from the gist of the disclosure. For example, in the embodiments described above, a car carrier (ferry) was used as an example of vessel 1, but the configuration is not limited to this. Furthermore, additional watertight compartments may be provided adjacent to the side casings 30A, 130A, 130B, and 230B in the bow-stern direction Da. This makes it possible to further suppress water ingress into the bulkhead deck 11, which is the boarding deck. Furthermore, watertight doors may be provided in the flood prevention walls 50 and 150.

[0060] Furthermore, while the above embodiments described the case in which side casings 30A, 130A, 130B, and 230B are provided directly above the main engine room and auxiliary engine room, which constitute the engine area, the configuration is not limited to this. For example, they may be provided directly above the compartment on the stern side 2A or the compartment on the bow side 2F of the engine area. Also, while the case in which only one second transverse bulkhead 21B is provided was described, two or more second transverse bulkheads 21B may be provided. In other words, the side casings 30A, 130A, 130B, and 230B may be formed to span three or more adjacent watertight compartments in the bow-stern direction Da below the bulkhead deck 11.

[0061] <Note> The vessel described in the embodiment can be understood, for example, as follows:

[0062] (1) According to the first embodiment, the ship 1 has a hull 2 ​​having a pair of left and right sides 3A, 3B, a bulkhead deck 11 that divides the inside of the hull 2 ​​into a lower space 41 and an upper space 40, a pair of first transverse bulkheads 21, 21A that are spaced apart in the bow-stern direction Da in the lower space 41 to divide rooms S11, S12, S112, and in the upper space 40, positioned along the sides 3A, 3B directly above the rooms S11, S12, S112, and through openings 22, 22A, 22B formed in the bulkhead deck 11 The vessel comprises side casings 30A, 30B, 130A, 130B that form a watertight compartment communicating with the aforementioned rooms S11, S12, S112, and a pair of flood prevention walls 50, 150 that extend upward from the bulkhead deck 11 and are provided on both the bow 2F side and the stern 2A side of the openings 22, 22A, 22B inside the watertight compartments of the side casings 30A, 30B, 130A, 130B, extending in the width direction of the watertight compartments inside the side casings 30A, 30B, 130A, 130B. Examples of rooms include the main engine room and the auxiliary engine room.

[0063] As a result, even if damage occurs at the intersection of the walls of the side casings 30A, 30B, 130A, and 130B with the hull sides 3A and 3B, water entering from the damaged area cannot move towards the opening 22 beyond the flood prevention walls 50 and 150, thus suppressing flooding into the watertight compartments S11, S12, and S112. Therefore, the number of compartments flooded in the event of damage can be reduced, improving stability in the event of damage.

[0064] (2) According to the second embodiment, the vessel 1 is the vessel 1 of (1), wherein the rooms S11, S12, S112 include a first flood prevention room 25A, which is a watertight compartment provided adjacent to the first transverse bulkhead 21A and the side walls 3A, 3B located on the bow 2F side, and a second flood prevention room 25B, which is a watertight compartment provided adjacent to the first transverse bulkhead 21A and the side walls 3A, 3B located on the stern 2A side. As a result, even if damage occurs at the intersection of the walls of the side casings 30A and 30B, the bulkhead deck 11, and the first transverse bulkhead 21A on the bow 2F side, the flood prevention wall 50 can suppress flooding into the watertight compartment S11 through the opening 22, and the first flood prevention chamber 25A and the second flood prevention chamber 25B can also suppress direct flooding into the watertight compartments S11, S12, and S112.

[0065] (3) According to the third embodiment, the vessel 1 is the vessel 1 of (1) or (2), comprising: a second transverse bulkhead 21B that separates the rooms S11 and S12 in the bow-stern direction Da to form a first watertight compartment S11 on the bow 2F side and a second watertight compartment S12 on the stern 2A side; a first opening 22A that serves as the opening 22 connecting the first watertight compartment S11 and the watertight compartment of the side casing 30A; a second opening 22B that serves as the opening 22 connecting the second watertight compartment S12 and the watertight compartment of the side casing 30A; and a bulkhead 51 that separates the first opening 22A and the second opening 22B, and partitions the watertight compartment of the side casing 30A in the bow-stern direction Da. As a result, even if one of the watertight compartments S11 and S12 is flooded and water moves into the side casing 30A from one of the first openings 22A and 22B, the partition wall 51 can prevent the water from moving to the other side of the first opening 22A and 22B. Therefore, even if one of the watertight compartments S11 and S12 is flooded, it is possible to prevent water from flowing into the other watertight compartment S11 and S12 through the first opening 22A and the second opening 22B.

[0066] (4) According to the fourth embodiment, the vessel 1 is any one of the vessels 1 of (1) to (3), wherein the flood prevention wall 50 is located between the first flood prevention chamber 25A and the opening 22 in the bow-stern direction Da, and between the second flood prevention chamber 25B and the opening 22. This allows the flood prevention wall 50 to restrict the movement of water toward the opening 22 while simultaneously separating the flood prevention wall 50 from the point where the wall of the side casing 30A intersects with the sides 3A and 3B. Therefore, if damage occurs at the point where the wall of the side casing 30A intersects with the sides 3A and 3B, damage to the flood prevention wall 50 at the same time can be suppressed.

[0067] (5) According to the fifth aspect, the vessel 1 is the vessel 1 of (3), wherein the first watertight compartment S11 and the second watertight compartment S12 are the main engine room or the auxiliary engine room. This prevents the main engine room and the auxiliary engine room from being flooded simultaneously.

[0068] (6) According to the sixth embodiment, the vessel 1 is the vessel 1 of (1), wherein the forward wall 131A on the bow 2F side that forms the side casings 130A, 130B is located further forward to the bow 2F than the first transverse bulkhead 21A on the bow 2F side, and the aft wall 131B on the stern 2A side that forms the side casings 130A, 130B is located further forward to the stern 2A than the first transverse bulkhead 21A on the stern 2A side. As a result, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the bow 2F side, and the sides 3A and 3B, the forward wall 131A of the side casings 130A and 130B will not be damaged, thus preventing flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck. Similarly, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the stern 2A side, and the sides 3A and 3B, the aft wall 131B of the side casings 130A and 130B will not be damaged, thus preventing flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck.

[0069] (7) According to the seventh embodiment, the vessel 1 is the vessel 1 of (6), comprising: a second transverse bulkhead 21B that separates the rooms S11 and S12 in the bow-stern direction Da, thereby forming a first watertight compartment S11 on the bow 2F side and a second watertight compartment S12 on the stern 2A side; a first opening 22A as the opening 22 that connects the first watertight compartment S11 and the watertight compartment inside the side casing 130A; a second opening 22B as the opening 22 that connects the second watertight compartment S12 and the watertight compartment inside the side casing 130A; and a bulkhead 51 that separates the first opening 22A and the second opening 22B, thereby dividing the watertight compartment inside the side casing 130A in the bow-stern direction Da. This prevents water from entering the watertight compartment S11 from the upper space 40 through the first opening 22A, and also prevents water from entering the watertight compartment S12 from the upper space 40 through the second opening 22B. Furthermore, even if one of the watertight compartments S11 or S12 is flooded, it prevents water from flowing into the other watertight compartment S11 or S12 through the first opening 22A and the second opening 22B.

[0070] (8) According to the eighth aspect, the vessel 1 is the vessel 1 of (7), wherein the first watertight compartment S11 and the second watertight compartment S12 are the main engine room or the auxiliary engine room. This prevents the main engine room and the auxiliary engine room from being flooded simultaneously.

[0071] (9) According to the ninth embodiment, the vessel 1 is any one of the vessels 1 of (6) to (8), further comprising: a first flood prevention chamber 125A, which is a watertight compartment located adjacent to the first transverse bulkhead 21A on the bow 2F side and the sides 3A, 3B, and located further forward to the bow 2F side than the first transverse bulkhead 21A on the bow 2F side; and a second flood prevention chamber 125B, which is a watertight compartment located adjacent to the first transverse bulkhead 21A on the stern 2A side and the sides 3A, 3B, and located further forward to the stern 2A side than the first transverse bulkhead 21A on the stern 2A side. This makes it possible to suppress flooding in watertight compartments S7 and S13, which are adjacent to the bow 2F side of watertight compartment S11 and the stern 2A side of watertight compartment S12, thereby reducing the number of compartments that are flooded.

[0072] (10) According to the tenth embodiment, the vessel 1 comprises a hull 2 ​​having a pair of left and right sides 3A, 3B; a bulkhead deck 11 dividing the inside of the hull 2 ​​into a lower space 41 and an upper space 40; a pair of first transverse bulkheads 21A arranged in the lower space 41 at intervals in the bow-stern direction Da to divide rooms S11, S12, S112; and arranged along the sides 3A, 3B directly above the rooms S11, S12, S112 in the upper space 40, with water inside. The vessel comprises side casings 130A, 130B, and 230B that form a dense compartment, wherein the forward wall 131A on the bow 2F side that forms the side casings 130A, 130B, and 230B is located further towards the bow 2F than the first transverse bulkhead 21A on the bow 2F side, and the aft wall 131B on the stern 2A side that forms the side casings 130A, 130B, and 230B is located further towards the stern 2A than the first transverse bulkhead 21A on the stern 2A side. As a result, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the bow 2F side, and the sides 3A and 3B, the forward wall 131A of the side casings 130A, 130B, and 230B will not be damaged, thus preventing flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck. Similarly, even if damage occurs at the intersection of the bulkhead deck 11, the first transverse bulkhead 21A on the stern 2A side, and the sides 3A and 3B, the aft wall 131B of the side casings 130A, 130B, and 230B will not be damaged, thus preventing flooding of the vehicle loading space on the bulkhead deck 11, which is the boarding deck. [Explanation of symbols]

[0073] 1…ship 2…hull 2A…stern 2F…bow 3A, 3B…side 4…bottom 5…scrill 7A…bowside ramp 7B…sternside ramp 8…funnel 9…shaft 11…bullet deck 12, 13, 14, 15, 16…deck 18…inner bottom 19…bow bulkhead 19A, 19B…vertical bulkhead 20…bullet 21…transverse bulkhead 21A…first transverse bulkhead 21B…second transverse bulkhead 22…opening 22A…first opening 22B…second opening 25, 125…floodproof chamber 25A, 125A… First flood-proof chamber 25B, 125B… Second flood-proof chamber 25C, 125C… Third flood-proof chamber 26A… Transverse wall 27B… Inner walls 30A, 30B, 130A, 130B, 230B… Sidge sealing 31A, 131A… Front wall 31B, 131B… Rear wall 31C, 131C… Inner wall 40… Upper space 41… Lower space 50, 150… Flood-proof wall 51… Partition wall Da… Bow and stern direction Dv… Up and down direction Dw… Wing direction S1~S7… Watertight zone studios S11, S12, S112… Watertight zone studios (rooms)

Claims

1. A hull having a pair of left and right sides, A bulkhead deck divides the hull into a lower space and an upper space, A pair of first transverse bulkheads are arranged in the aforementioned lower space at intervals in the bow-stern direction to partition the cabin, A side casing positioned along the side of the ship directly above the room in the upper space, forming a watertight compartment on the inside that communicates with the room through an opening formed in the bulkhead deck, The side casing comprises a pair of flood-preventing walls provided on both the bow and stern sides of the opening in the watertight compartment inside the side casing, extending upward from the bulkhead deck and spanning the width of the watertight compartment inside the side casing, The aforementioned room is The first flood prevention chamber, which is a watertight compartment, is provided adjacent to the first transverse bulkhead located at the bow and the side of the hull, It comprises a second flood prevention chamber, which is a watertight compartment, located adjacent to the first transverse bulkhead and the side of the hull, located on the stern side. The aforementioned flood prevention wall is located between the first flood prevention chamber and the opening in the bow-stern direction, and between the second flood prevention chamber and the opening. ship.

2. A second transverse bulkhead separates the aforementioned chamber in the bow-stern direction, forming a first watertight compartment on the bow side and a second watertight compartment on the stern side. The first opening, which serves as the opening that connects the first watertight compartment and the watertight compartment of the side casing, The second opening, which serves as the opening that connects the second watertight compartment and the watertight compartment of the side casing, A bulkhead is provided to separate the first opening and the second opening, dividing the watertight compartment of the side casing in the bow-stern direction, The ship according to claim 1, comprising:

3. The first watertight compartment and the second watertight compartment are either the main engine room or the auxiliary engine room. The vessel according to claim 2.

4. A hull having a pair of left and right sides, A bulkhead deck divides the hull into a lower space and an upper space, A pair of first transverse bulkheads are arranged in the aforementioned lower space at intervals in the bow-stern direction to partition the cabin, A side casing positioned along the side of the ship directly above the room in the upper space, forming a watertight compartment on the inside that communicates with the room through an opening formed in the bulkhead deck, The side casing comprises a pair of flood-preventing walls provided on both the bow and stern sides of the opening in the watertight compartment inside the side casing, extending upward from the bulkhead deck and spanning the width of the watertight compartment inside the side casing, The forward wall on the bow side that forms the side casing is located further forward than the first transverse bulkhead on the bow side. The aft wall on the stern side that forms the side casing is located further aft than the first transverse bulkhead on the stern side. ship.

5. A second transverse bulkhead separates the aforementioned chamber in the bow-stern direction, forming a first watertight compartment on the bow side and a second watertight compartment on the stern side. The first opening, which serves as the opening that connects the first watertight compartment and the watertight compartment inside the side casing, The second opening, which serves as the opening that connects the second watertight compartment and the watertight compartment inside the side casing, A bulkhead is provided to separate the first opening and the second opening, thereby dividing the watertight compartment inside the side casing in the bow-stern direction. The ship according to claim 4, comprising:

6. The first watertight compartment and the second watertight compartment are either the main engine room or the auxiliary engine room. The vessel according to claim 5.

7. A first flood prevention chamber, which is a watertight compartment located adjacent to the first transverse bulkhead on the bow side and the side of the hull, and located further forward than the first transverse bulkhead on the bow side, The vessel further comprises a second flood prevention chamber, which is a watertight compartment located adjacent to the first transverse bulkhead and the side of the hull, and further aft of the first transverse bulkhead on the stern side. The vessel according to any one of claims 4 to 6.

8. A hull having a pair of left and right sides, A bulkhead deck divides the hull into a lower space and an upper space, A pair of first transverse bulkheads are arranged in the aforementioned lower space at intervals in the bow-stern direction to partition the cabin, A side casing is positioned along the side of the ship directly above the chamber in the upper space, forming a watertight compartment on the inside, Equipped with, The forward wall on the bow side that forms the side casing is located further forward than the first transverse bulkhead on the bow side. A ship in which the aft wall on the stern side forming the side casing is located further aft than the first transverse bulkhead on the stern side.

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