A maritime evacuation system

Abstract

The present disclosure relates to a maritime evacuation system to be installed on a maritime structure, comprising an inflatable, floatable unit configured to be deployed from the maritime structure, the inflatable, floatable unit having a longitudinal extension, and a first bowsing system configured to positioning and maintaining an intended position of the inflatable, floatable unit in relation to the maritime structure during evacuation of persons at sea, comprising a first bowsing line extending from the maritime structure to a joint, a second bowsing line having a first end and a second end, the first end and the second end being connected with the inflatable, floatable unit at a first attachment point and at a second attachment point, respectively, the first attachment point is arranged at a distance from the second attachment point in the longitudinal extension, the second bowsing line extends from the first attachment point via the joint to the second attachment point, wherein the second bowsing line is freely movable in the joint.

Description

[0001] A MARITIME EVACUATION SYSTEM

[0002] The present disclosure relates to a maritime evacuation system to be installed on a maritime structure, comprising an inflatable, floatable unit configured to be deployed from the maritime structure, the inflatable, floatable unit having a longitudinal extension, and a first bowsing system configured to positioning and maintaining an intended position of the inflatable, floatable unit in relation to the maritime structure during evacuation of persons at sea, first bowsing system comprising a first bowsing line extending from the maritime structure to a joint, a second bowsing line having a first end and a second end, the first end and the second end being connected with the inflatable, floatable unit at a first attachment point and at a second attachment point, respectively, the first attachment point is arranged at a distance from the second attachment point in the longitudinal extension.

[0003] Inflatable, floatable units, such as liferafts or platforms are often used in the evacuation of the passengers or crew members from a maritime structure, such as a vessel.

[0004] During evacuation, a container housing the non-inflated floatable unit may be deployed into the water, whereinafter it will start to inflate. During this process both the inflated, floatable unit as well as the non-inflated, floatable unit will be connected to the vessel via bowsing lines. After having been inflated, the floatable unit will be positioned and bowsed to the vessel, which often takes time due to the stressed situation as well as heavy weather conditions.

[0005] However, heeling movements as well as the movements which are caused by the loads such as wind, current or waves, exerted on the vessel, render that the position as well as the movements of the vessel change all the time. Furthermore, due to the fact that the floatable unit is smaller in size than the vessel, the floatable unit moves more rapidly than the vessel.

[0006] These movements of the vessel, as well as of the inflatable, floatable unit causes the difficulties of entering the floatable unit from the vessel, as the distance, both in height, in the transverse as well as in the longitudinal direction between the vessel and the floatable unit varies constantly, whereby it is almost impossible to hold the floatable unit in a secure and fixed position in relation to the vessel.

[0007] Often the evacuation of persons from the vessel takes place during heavy weather, which furthermore influences as well as exerts great forces and loads on the vessel and the inflatable, floatable unit.

[0008] Thus, several resources, i.e. persons, are dedicated to handle and bowse the inflatable, floatable unit to the vessel.

[0009] The above-mentioned drawbacks and disadvantages are primarily explained in connection with the vertical distance. However, similar drawbacks and disadvantages occur in relation to the transverse and longitudinal distances between the evacuation point of the vessel and the floatable unit.

[0010] In addition, since the forces and loads exerted on the bowsing today are considerable and will be even higher in the future, especially in high seas and under heavy weather conditions, it is difficult to control the bowsing of the known evacuation systems. Also, if the vessel and the inflatable, floatable units are moving at different speeds, the bowsing system shall be configured to control the inflatable, floatable units independently and together. However, during this control of the inflatable, floatable units, a certain "braking distance" is necessary, otherwise the inertia of the system will peak the forces, which may damage the bowsing line and / or the inflatable, floatable units.

[0011] Examples of maritime evacuation systems are given in EP3112247A1, WO95 / 35233A1 and EP2772425.

[0012] It is an object of the present disclosure to wholly or partly overcome the above disadvantages and drawbacks of the prior art. More specifically, it is an object to provide an improved maritime evacuation system having a minimum of handling during evacuation.

[0013] The above objects, together with numerous other objects, advantages and features, which will become evident from the below description, are accomplished by a solution in accordance with the present disclosure according to claim 1. In one aspect, there is provided a maritime evacuation system to be installed on a maritime structure, comprising an inflatable, floatable unit configured to be deployed from the maritime structure, the inflatable, floatable unit having a longitudinal extension, and a first bowsing system configured to positioning and maintaining an intended position of the inflatable, floatable unit in relation to the maritime structure during evacuation of persons at sea, comprising a first bowsing line extending from the maritime structure to a joint, a second bowsing line having a first end and a second end, the first end and the second end being connected with the inflatable, floatable unit at a first attachment point and at a second attachment point, respectively, the first attachment point is arranged at a distance from the second attachment point in the longitudinal extension, the second bowsing line extends from the first attachment point via the joint to the second attachment point, wherein the second bowsing line is freely movable in the joint.

[0014] By the maritime evacuation system according to the disclosure, the cumbersome handling of the bowsing procedure is minimised during the entire evacuation. Since the second bowsing line is freely movable in the joint, the inflatable, floatable unit can be moved in the longitudinal extension due to external factors like wind, waves, and currents, as well as in response to the movements of the maritime structure.

[0015] Different examples being defined in the related dependent claims.

[0016] In addition, the second bowsing line may partly or fully comprise an elastic material.

[0017] Moreover, a first spring element may arranged between the first end of the second bowsing line and the first attachment point and a second spring element is arranged between the second end of the second bowsing line and the second attachment point.

[0018] Also, the elastic material may be at least arranged near the first end and second end of the second bowsing line.

[0019] Furthermore, the elastic material and / or spring elements may be being extended during movements of the inflatable, floatable unit so that a restoring force is provided in the elastic material and / or the spring element whereby the elastic or spring will restore the inflatable, floatable unit to its intended equilibrium position.

[0020] Additionally, the joint may comprise a thimble, a block, or similar facilitating that the second bowsing line can move freely in the joint.

[0021] Moreover, the first bowsing line may be securely connected with the joint.

[0022] The maritime evacuation system may also comprise a second bowsing system arranged at predetermined distance from the first bowsing system.

[0023] Also, an evacuation chute or slide may be arranged between the maritime structure and the inflatable, floatable unit, the evacuation chute or slide is configured to embark people from the maritime structure to the inflatable floatable unit during evacuation.

[0024] Furthermore, the maritime evacuation system may comprise an evacuation station configured to be arranged on the maritime structure.

[0025] In addition, the evacuation station may comprise a line dispensing device, the line dispensing device is configured to level out pull on the first bowsing lines by supplying additional line length between the line dispensing device and the inflatable, floatable unit.

[0026] Also, the line dispensing device may comprise a plurality of first device turning points and a plurality of second device turning points, the first device turning points being arranged opposite the second device turning points.

[0027] Furthermore, the first device turning points may be connected with a frame, and the second device turning points may be connected with a tensioning unit.

[0028] Additionally, the tensioning unit may comprise a number of springs, a linear actuator, a gas cylinder, a hydraulic cylinder or any combination thereof.

[0029] The maritime evacuation system may further comprise a guide arm, the guide arm may be configured to be moved between an inactive position and an active position. Moreover, the guide arm may be connected with the frame via a pivot joint and that the guide arm has an arm turning point at the opposite end compared to the pivot joint.

[0030] Furthermore, the guide arm may be configured to guide the first bowsing line from one of the first turning points to the joint.

[0031] In addition, the first bowsing line may be extending directly from the maritime structure to the joint or it is extending indirectly via one or more turning point(s) and / or split tubes.

[0032] The present disclosure also relates to a maritime structure such as a vessel comprising a maritime evacuation system as described above.

[0033] Additional features and advantages are disclosed in the following description, claims, and drawings, and in part will be readily apparent therefrom to those skilled in the art or recognized by practicing the disclosure as described herein.

[0034] The disclosure and its many advantages will be described in more detail below with reference to the accompanying schematic drawings, which for the purpose of illustration show some non-limiting examples and in which

[0035] Fig. 1 shows in a side view an example of the present disclosure,

[0036] Figs. 2 and 3 show in side views an example of the present disclosure,

[0037] Fig. 4 shows in a perspective view an example of the disclosure,

[0038] Fig. 5 shows in a perspective view an example of the disclosure,

[0039] Fig. 6 shows an example of a line dispensing device,

[0040] Fig. 7 shows a deployment sequence of an inflatable floatable unit,

[0041] Fig. 8 shows a deployment arrangement,

[0042] Fig . 9 shows another example of present disclosure, Figs. 10-12 show another example of the line dispensing device, and

[0043] Figs. 13a-13b show an example of a guide arm of the line dispensing device.

[0044] All the figures are highly schematic and not necessarily to scale, and they show only those parts which are necessary in order to elucidate the disclosure, other parts being omitted or merely suggested.

[0045] Fig. 1 shows an example of the present disclosure in a side view. In Fig. 1, a maritime evacuation system 1 to be installed on a maritime structure 2 is shown. The maritime evacuation system 1 comprising an inflatable, floatable unit 3 configured to be deployed from the maritime structure 2, the inflatable floatable unit having a longitudinal extension e. In the example in Fig. 1, the inflatable, floatable unit 3 is deployed into the water w. A sequence of deployment will be described further below. In the present disclosure the inflatable, floatable unit is an inflatable liferaft.

[0046] The maritime evacuation system 1 also comprises a first bowsing system 4 configured to positioning and maintaining an intended position of the inflatable, floatable unit 3 in relation to the maritime structure 2 during evacuation of persons at sea.

[0047] The first bowsing system 4 comprising a first bowsing line 5 extending from the maritime structure 2 to a joint 6, and a second bowsing line 7 having a first end 8 and a second end 9, the first end 8 and the second end 9 being connected with the inflatable floatable unit 3 at a first attachment point 10 and at a second attachment point 11, respectively, the first attachment point 10 is arranged at a distance from the second attachment point 11 in the longitudinal extension e of the inflatable, floatable unit. In addition, the second bowsing line 7 extends from the first attachment point 10 via the joint 6 to the second attachment point 11. In this example, the second bowsing line has the shape of an inverted V in the intended position of the inflatable, floatable unit 3. The second bowsing line 7 is freely movable in the joint 6. Since the second bowsing line 7 is freely movable in the joint 6, the inflatable, floatable unit 3 can be moved in the longitudinal extension e due to external circumstances such as wind, waves, current but also in relation to movements of the maritime structure. By the maritime evacuation system 1, the cumbersome handling of the bowsing procedure is limited during the entire evacuation.

[0048] The maritime evacuation system 1 may be used in relation to different height h between a deck 12 of the maritime structure 2 and the water level w. For instance, when the height is below 12 meters additional bowsing turning points on the maritime structure 2 may be avoided. If the height h is higher than 12 meters it may necessary to have additional bowsing turning points on the maritime structure 2 and / or split tubes.

[0049] The maritime evacuation system 1 may also comprise an evacuation station 13 arranged on the maritime structure 2.

[0050] In addition, the second bowsing line 7 partly or fully comprises an elastic material. Hereby the second bowsing line 7 provides the bowsing dynamic in varying wind, current and wave conditions without the need for additional handling of the bowsing system by the crew.

[0051] In an example, a first spring element is arranged between the first end 8 of the second bowsing line 7 and the first attachment point 10 and a second spring element is arranged between the second end 9 of the second bowsing line 7 and the second attachment point 11. Hereby, the spring elements and the second bowsing line 7 provide dynamic bowsing in varying wind, current and wave conditions without the need for additional handling of the bowsing system by the crew.

[0052] By arranging elasticity and / or spring elements in or in connection with the second bowsing line 7 it is ensured that the inflatable, floatable unit is repositioned after movement of the same and thereby moved and maintained to the intended position.

[0053] Furthermore, the elastic material may at least be arranged near the first end and the second end of the second bowsing line. Hereby the second bowsing line 7 may both have elasticity and strength. Moreover, the elastic material may be formed as an elastic robe. A plurality of elastic robes may be arranged adjacent to each other, or mutual twisted together, or a combination thereof.

[0054] Additionally, the elastic material and / or spring elements may be configured to be extended during movements of the inflatable, floatable unit 3 so that a restoring force is provided in the elastic material and / or in the spring element, whereby the elastic material or spring element will restore the inflatable, floatable unit 3 to its intended equilibrium position after it has been moved due to varying wind, current and wave conditions, and / or Stokes drift.

[0055] Furthermore, the spring elements may each comprise an expansion spring or one or more elastic robe(s), or a combination thereof.

[0056] In addition, the joint 6 may comprise a thimble, a block, a pulley or similar for facilitating that the second bowsing line 7 can move freely in the joint 6.

[0057] As shown in Fig. 1, the inflatable, floatable unit 3 in an evacuation circumstance may be positioned in a lower position in relation to the joint 6.

[0058] In Figs. 2 and 3, another example of the present disclosure is shown. Fig. 2 shows the maritime evacuation system 1 seen from the water side, and Fig. 3 shows the maritime evacuation system 1 from the side of the maritime structure 2.

[0059] In the same manner as Fig. 1, the maritime evacuation system 1 comprises a first bowsing system 4. The first bowsing system 4 comprising a first bowsing line 5 extending from the maritime structure 2 to a joint 6, and a second bowsing line 7 having a first end 8 and a second end 9, the first end 8 and the second end 9 being connected with the inflatable, floatable unit 3 at a first attachment point 10 and at a second attachment point 11, respectively, the first attachment point 10 is arranged at a distance from the second attachment point 11 in the longitudinal extension e of the inflatable, floatable unit. In addition, the second bowsing line 7 extends from the first attachment point 10 via the joint 6 to the second attachment point 11. In this example, the second bowsing line has the shape of an inverted V in the intended position of the inflatable, floatable unit 3. The second bowsing line 7 is freely movable in the joint 6. The maritime evacuation system 1 may also comprise a second bowsing system 4' arranged at predetermined distance from the first bowsing system 4. The second bowsing system 4' is in this example identical to the first bowsing system 4.

[0060] The second bowsing system 4' comprising a first bowsing line 5' extending from the maritime structure 2 to a joint 6', and a second bowsing line 7' having a first end 8' and a second end 9', the first end 8' and the second end 9' being connected with the inflatable floatable unit 3 at a first attachment point 10' and at a second attachment point 11', respectively, the first attachment point 10' is arranged at a distance from the second attachment point 11' in the longitudinal extension of the inflatable, floatable unit 3. In addition, the second bowsing line 7' extends from the first attachment point 10' via the joint 6' to the second attachment point 11'. In this example, the second bowsing line 7' has the shape of an inverted V in the intended position of the inflatable, floatable unit 3. The second bowsing line 7' is freely movable in the joint 6'.

[0061] In addition, the second bowsing line 7, 7' is securely connected with the inflatable, floatable unit 3 at the attachment points 10, 11, 10', 11' of the inflatable, floatable unit 3.

[0062] In addition, by implementing the first bowsing system 4 and the second bowsing system 4' the risk for the inflatable, floatable unit 3 may rotate in the water is minimised. Hereby, it is ensured that the intended side of the inflatable, floatable unit 3 is facing the side of the maritime structure so that persons may enter the inflatable, floatable unit 3.

[0063] In Figs. 2 and 3, an evacuation chute 14 is arranged between the maritime structure 2 and the inflatable, floatable unit 3 in the deployed position, the evacuation chute 14 is configured to embark people from the maritime structure 2 to the inflatable, floatable unit 3 during evacuation. The evacuation chute 14 may comprise a helically path. In another example, a slide may be arranged between the maritime structure 2 and the inflatable, floatable unit 3 in the deployed position. As mentioned above, the maritime evacuation system 1 may comprise an evacuation station 13 configured to be arranged on the maritime structure.

[0064] In Fig. 4, an example of the maritime evacuation system 1 is shown. The maritime evacuation system 1 comprises, in the same manner as in Figs. 2 and 3, an inflatable, floatable unit 3 and a first bowsing system 4 and a second bowsing system 4' arranged adjacent to each other. The first bowsing system 4 and the second bowsing system 4' comprises the same features as described above.

[0065] The evacuation station 12 may comprise a storage unit 15, the storage unit 15 is configured to store the deflated inflatable, floating unit and the bowsing systems 4, 4' on-board the maritime structure 2. In the present example, the storage unit 15 is arranged on the deck 12 of the maritime structure 2. The storage unit 15 may also be configured to store the chute 14 or slide when not deployed.

[0066] Furthermore, the storage unit 15 may also comprise a deployment arrangement 16.

[0067] In Fig. 5, an example of the maritime evacuation system 1 is shown. The maritime evacuation system 1 comprises, in the same manner as in Figs. 2 and 3, an inflatable, floatable unit 3 and a first bowsing system 4 and a second bowsing system 4' arranged adjacent to each other. The first bowsing system 4 and the second bowsing system 4' comprises the same features as described above.

[0068] In this example, the height between the deck 12 of the maritime structure 2 and the water level w is large compared to the previous examples. Hence, split-tubes 17 may be arranged on a side 18 of the maritime structure 2 for guiding the first bowsing lines 5, 5'. Turning points may also be arranged on the side of the maritime structure 2 for guiding the bowsing lines.

[0069] Furthermore, the evacuation station 13 is configured to function as an entrance point for the evacuation into the inflatable, floatable unit 3 through the chute 14.

[0070] The maritime evacuation system may also comprise a winch 21 being arranged in connection with the first bowing line at the evacuation station.

[0071] Moreover, the evacuation station may also comprise a line dispensing device 20 as shown in Fig. 6. The line dispensing device 20 is configured to level out pull on the first bowsing lines 5, 5' by supplying additional line length between the line dispensing device 20 and the joint 6. The line dispensing device 20 is arranged between the winch 21 and the joint 6. The line dispensing device 20 comprises a plurality of first device turning points 22 and a plurality of second device turning points 23, the first device turning points

[0072] 22 being arranged opposite the second device turning points 23. In the example four first device turning points 22 are present and three second device turning points 23.

[0073] The first device turning points 22 are connected with a frame 24, and the second device turning points 23 are connected with a tensioning unit 25. The tensioning unit 25 comprises a number of springs 26. In the present example, five springs 26 are provided. In other examples another number of springs may be arranged. The springs 26 may be expansion springs. In addition, the tensioning unit 25 is moveable in a vertical direction compared to the first device turning points 22.

[0074] During operation of the line dispensing device 20, the second device turning points

[0075] 23 are being pulled up by the springs 26 in the relaxed state of the line dispensing device 20. Hereby, a length of the first bowsing line 5, 5' which is guided from the winch 21 via the first device turning points 22 and second device turning points 23 to additional frame turning points 27 towards the joint, is kept in the line dispensing device 20. The distance between the first device turning points 22 and second device turning points 23 is large in the relaxed state of the line dispensing device 20. In the circumstance a large pull in the bowsing lines occur the springs 26 will be expanded and the distance between the first device turning points 22 and the second device turning points 23 will be minimised. Accordingly, additional length of the first bowsing line 5 will be pulled out of the line dispensing device 20 which will lower the pull force on the bowsing lines and the potential peak pull will be absorbed by the springs 26 of the line dispensing device 20.

[0076] The tensioning unit 25 is arranged in a vertical position in Fig. 6. In another example, it may be arranged in a horizontal position or any position between horizontal and vertical.

[0077] In Fig. 7, a deployment sequence is shown. In the two figures to the left of Fig. 7, the maritime evacuation system 1 is shown stored in the storage unit 15 at the evacuation station 13 on the maritime structure 2. In the third figure from the left, the deployment arrangement 16 is starting to deploy the chute 14 and the deflated inflatable, floatable unit from the evacuation station 13 into the water. In the second figure from the right, the maritime evacuation system 1 has been deployed and the inflatable, floatable unit 3 is ready to be embarked via the chute 14. The first bowsing system 4 and the second bowsing system 4' are positioning and maintaining the inflatable, floatable unit 3 in the intended position.

[0078] In the figure to the right, a smaller height between the deck of the maritime structure 2 and the water level is present than in the other figures to the left. The maritime evacuation system 1 has also been deployed in this figure, and the inflatable, floatable unit 3 is ready to be embarked via the chute 14. The first bowsing system 4 and the second bowsing system 4' are positioning and maintaining the inflatable, floatable unit 3 in the intended position.

[0079] In Fig. 8, the deployment arrangement 16 is shown. The deployment arrangement 16 is positioned in the storage unit 15 at the evacuation station 13 arranged on the maritime structure 2. During deployment of the maritime evacuation system 1, the deployment arrangement 16 move the chute 14 and the deflated inflatable, floatable unit 3 out of the storage unit 15 and is configured to lower the chute 14 and the deflated inflatable, floatable unit 3 into the water. When the deflated inflatable, floatable unit 3 is in the water it will be inflated automatically and the bowsing system will ensure that it positioned in the intended position for embarking of persons via the chute into the inflatable, floatable unit 3.

[0080] Fig. 9 shows another example of the present disclosure in a side view. In Fig. 9, a maritime evacuation system 1 to be installed on a maritime structure 2 is shown. The maritime evacuation system 1 comprising an inflatable, floatable unit 3 configured to be deployed from the maritime structure 2, the inflatable floatable unit having a longitudinal extension e. The longitudinal extension e is one of the sides of the inflatable, floatable unit 3 being arranged opposite a side of the maritime structure 2. In the example in Fig. 9, the inflatable, floatable unit 3 is deployed into the water w. A sequence of deployment will be described further below. In the present disclosure the inflatable, floatable unit 3 is an inflatable liferaft 3.

[0081] The maritime evacuation system 1 also comprises a first bowsing system 4 configured to positioning and maintaining an intended position of the inflatable, floatable unit 3 in relation to the maritime structure 2 during evacuation of persons at sea. The first bowsing system 4 comprising a first bowsing line 5 extending from the maritime structure 2 to a joint 6 and a second first bowsing line 5" also extending from the maritime structure 2 to the joint 6. The first bowsing line 5 and the second first bowsing line 5" is each connected with maritime structure 2 with a distance between them so that a V-shaped configuration is obtained. Both the first bowsing line 5 and the second first bowsing line 5" is securely connected with joint 6.

[0082] The first bowsing system 4 also comprises a second bowsing line 7 having a first end 8 and a second end 9, the first end 8 and the second end 9 being connected with the inflatable floatable unit 3 at a first attachment point 10 and at a second attachment point 11, respectively, the first attachment point 10 is arranged at a distance from the second attachment point 11 in the longitudinal extension e of the inflatable, floatable unit 3. In addition, the second bowsing line 7 extends from the first attachment point 10 via the joint 6 to the second attachment point 11. In this example, the second bowsing line has the shape of an inverted V in the intended position of the inflatable, floatable unit 3. The second bowsing line 7 is freely movable in the joint 6. Since the second bowsing line 7 is freely movable in the joint 6, the inflatable, floatable unit 3 can be moved in the longitudinal extension e due to external circumstances such as wind, waves, current but also in relation to movements of the maritime structure. By the maritime evacuation system 1, the cumbersome handling of the bowsing procedure is limited during the entire evacuation. In addition, by implementing the first bowsing line 5 and the second first bowsing line 5' the risk for the inflatable, floatable unit 3 may rotate in the water is minimised. Hereby, it is ensured that the intended side of the inflatable, floatable unit 3 is facing the side of the maritime structure 2 so that persons may enter the inflatable, floatable unit 3.

[0083] The maritime evacuation system 1 may also comprise one or more winches being arranged in connection with the first bowing line or each of the first bowsing lines at the evacuation station 13.

[0084] Moreover, the evacuation station 13 may also comprise a line dispensing device 20 as shown in Fig. 10. The line dispensing device 20 is configured to level out pull on the first bowsing lines 5, 5' by supplying additional line length between the line dispensing device 20 and the joint. In the example shown in Fig. 10, the line dispensing system 20 is not activated. The line dispensing device 20 comprises a plurality of first device turning points 22 and a plurality of second device turning points 23, the first device turning points 22 being arranged opposite the second device turning points 23. The turning points may be arranged side by side in for instance in a block, pulley or similar having several turnings points.

[0085] The first device turning points 22 are connected with a frame 24, and the second device turning points 23 are connected with a tensioning unit 25. The tensioning unit 25 comprises a linear actuator 40 being connected with a gas cylinder 41. The linear actuator 40 has a pressure chamber and a piston. The piston is connected with the second device turning points 23. The piston is configured to be moved up and down in view of the pressure of the pressure chamber. The pressure the provided by the gas cylinder 41.

[0086] In addition, the line dispensing device 20 also comprises a guide arm 45 movable between an inactive position (as shown in Fig. 10) and an active position (shown in Fig. 11). The guide arm 45 is connected with the frame 24 via pivot point 47.

[0087] In Fig. 11, the guide arm 45 is shown in the activated position. In the activated position the guide arm 45 guides the first bowsing line 5, 5', 5" from the turning points to the joint (not shown). The guide arm 45 comprises an arm turning point 46 arranged at the opposite end compared to the pivot joint 47. The guide arm ensures that the first bowsing line 5, 5', 5" is free of the maritime structure 2 so that the first bowing line 5, 5', 5" may move freely without interference of the maritime structure 2.

[0088] During operation of the line dispensing device 20, and as shown in Fig. 12, the second device turning points 23 are being raised by the piston 42 of the linear actuator 40. Hereby, a length of the first bowsing line 5, 5', 5" which is guided via the first device turning points 22 and second device turning points 23 and the guide arm 45 towards the joint, is kept in the line dispensing device 20. The distance between the first device turning points 22 and second device turning points 23 is large in the situation shown in Fig 12. In the circumstance a large pull in the bowsing lines 5, 5', 5" occur the piston 42 of linear actuator 40 will be forced downwards whereby the distance between the first device turning points and the second device turning points will be minimised as shown in Fig. 11 where the piston is its lowermost position. Accordingly, additional length of the first bowsing line 5, 5', 5" will be pulled out of the line dispensing device 20 which will lower the pull force on the bowsing lines and the potential peak pull will be absorbed by the linear actuator 40 and the gas cylinder 41 of the line dispensing device 20.

[0089] In another example the tensioning unit 25 may comprise a hydraulic cylinder, pneumatic cylinder, or a combination thereof together with one or more springs.

[0090] In Figs. 13a-13b, the guide arm 45 is shown in a front view. In Fig. 13a, the arm turning point 46 is guiding the first bowsing line 5, 5', 5" from the guide arm towards the joint. The arm turning point 46 is rotatably arranged in relation to a longitudinal axis 48 of the guide arm 45 as indicated with the arrows A in Fig. 13a. Hence, the arm turning point 46 may be rotated to the left and to the right depending of the movement and position of the inflatable, floatable unit 3 along the maritime structure. In addition, the guide arm 45 may also be moved around the pivot joint during operation as indicated with arrow B. The arm turning point 46 may both be rotated around the axis 48 as well as moved up and down by rotating the guide arm around the pivot joint. In Fig. 13b, the arm turning point 46 has been rotated to the left around the axis 48 as indicated by the arrow A.

[0091] In addition, the arm turning point 46 may comprises a pulley or a block.

[0092] Furthermore, the maritime structure 2 is a vessel such as a passenger ship or ferry.

[0093] The present disclosure also relates to a maritime structure such as a vessel comprising a maritime evacuation system as described above.

[0094] Certain aspects and variants of the disclosure are set forth in the following clauses numbered consecutive below.

[0095] Clause 1: A maritime evacuation system (1) to be installed on a maritime structure (2), comprising an inflatable, floatable unit (3) configured to be deployed from the maritime structure, the inflatable, floatable unit (3) having a longitudinal extension (e), and a first bowsing system (4) configured to positioning and maintaining an intended position of the inflatable, floatable unit (3) in relation to the maritime structure during evacuation of persons at sea, comprising a first bowsing line (5, 5', 5") extending from the maritime structure to a joint (6), a second bowsing line (7) having a first end (8) and a second end (9), the first end (8) and the second end (9) being connected with the inflatable, floatable unit (3) at a first attachment point (10) and at a second attachment point (11), respectively, the first attachment point (10) is arranged at a distance from the second attachment point (11) in the longitudinal extension (e), the second bowsing line (7) extends from the first attachment point (10) via the joint (2) to the second attachment point (11), wherein the second bowsing line (7) is freely movable in the joint (6).

[0096] Clause 2: A maritime evacuation system (1) according to clause 1, wherein the second bowsing line (7) partly or fully comprises an elastic material.

[0097] Clause 3: A maritime evacuation system (1) according to clause 1 and / or 2, wherein a first spring element is arranged between the first end (8) of the second bowsing line (7) and the first attachment point (10) and a second spring element is arranged between the second end (9) of the second bowsing line (7) and the second attachment point (11).

[0098] Clause 4: A maritime evacuation system (1) according to clause 2, wherein the elastic material is at least arranged near the first end (8) and second end (9) of the second bowsing line (7).

[0099] Clause 5: A maritime evacuation system (1) according to clause 2 and / or 4, wherein the elastic material is formed as an elastic robe.

[0100] Clause 6: A maritime evacuation system (1) according to any of the clauses 2 to 5, wherein the elastic material and / or spring elements are being extended during movements of the inflatable, floatable unit (3) so that a restoring force is provided in the elastic material and / or the spring element whereby the elastic or spring will restore the inflatable, floatable unit (3) to its intended equilibrium position.

[0101] Clause 7: A maritime evacuation system (1) according to clause 3, wherein the spring elements comprises an expansion spring, one or more elastic robe(s). Clause 8: A maritime evacuation system (1) according to any of the preceding clauses, wherein the joint (6) comprises a thimble, a block, pulley or similar facilitating that the second bowsing line (7) can move freely in the joint (6).

[0102] Clause 9: A maritime evacuation system (1) according to any of the preceding clauses, wherein the inflatable, floatable unit (3) is an inflatable liferaft (3).

[0103] Clause 10: A maritime evacuation system (1) according to any of the preceding clauses, wherein the first bowsing line (5, 5', 5")is securely connected with the joint (6).

[0104] Clause 11 : A maritime evacuation system (1) according to any of the preceding clauses, wherein the inflatable, floatable unit (3) in an evacuation circumstance is positioned in a lower position in relation to the joint (6).

[0105] Clause 12: A maritime evacuation system (1) according to any of the preceding clauses, wherein maritime evacuation system (1) comprises a second bowsing system (4') arranged at predetermined distance from the first bowsing system (4).

[0106] Clause 13: A maritime evacuation system (1) according to clause 12, wherein the second bowsing system (4') comprises a first bowsing line (5') extending from the maritime structure to a joint (6'), a second bowsing line (7') having a first end (8') and a second end (9'), the first end (8') and the second end (9') being connected with the inflatable, floatable unit (3) at a first attachment point (10') and at a second attachment point (11'), respectively, the first attachment point (10') is arranged at a distance from the second attachment point (11') in the longitudinal extension, the second bowsing line (7') extends from the first attachment point (10') via the joint (6') to the second attachment point (11'), the second bowsing line (7') is freely movable in the joint (6').

[0107] Clause 14: A maritime evacuation system (1) according to clause 12 and / or 13, wherein the second bowsing line (7') is securely connected with the inflatable, floatable unit (3) at the attachment points (10', 11') of the inflatable, floatable unit. Clause 15: A maritime evacuation system (1) according to any of the preceding clauses, wherein an evacuation chute (14) or slide is arranged between the maritime structure and the inflatable, floatable unit (3), the evacuation chute (14) or slide is configured to embark people from the maritime structure (2) to the inflatable, floatable unit (3) during evacuation.

[0108] Clause 16: A maritime evacuation system (1) according to any of the preceding clauses, wherein the maritime evacuation system (1) comprises an evacuation station (13) configured to be arranged on the maritime structure.

[0109] Clause 17: A maritime evacuation system (1) according to clause 14, wherein the evacuation station (13) comprises a storage unit (15), the storage unit is configured to store the deflated inflatable floating unit (3) and the bowsing system (4, 4') on-board the maritime structure (2).

[0110] Clause 18: A maritime evacuation system (1) according to clause 17, wherein the storage unit (15) is configured to store the chute (14) or slide.

[0111] Clause 19: A maritime evacuation system (1) according to clause 16, wherein the evacuation station (13) is configured to function as an entrance point for the evacuation into the inflatable, floatable unit (3).

[0112] Clause 20: A maritime evacuation system (1) according to any of the preceding clauses, wherein a winch (21) is arranged in connection with the first bowing line at the evacuation station.

[0113] Clause 21 : A maritime evacuation system (1) according to any of the preceding clauses, wherein the evacuation station (13) comprises a line dispensing device (20), the line dispensing device (20) is configured to level out pull on the first lines (5, 5', 5") by supplying additional line length between the line dispensing device (20) and the inflatable, floatable unit (3).

[0114] Clause 22: A maritime evacuation system (1) according to clause 21, wherein the line dispensing device (20) is arranged between the winch and the joint (6). Clause 23: A maritime evacuation system (1) according to clause 21 and / or 22, wherein the line dispensing device (20) comprises a plurality of first device turning points (22) and a plurality of second device turning points (23), the first device turning points (22) being arranged opposite the second device turning points (23).

[0115] Clause 24: A maritime evacuation system (1) according to clause 23, wherein the first device turning points (22) are connected with a frame (24), and the second device turning points (23) are connected with a tensioning unit (25).

[0116] Clause 25: A maritime evacuation system (1) according to clause 24, wherein the tensioning unit (25) comprises a number of springs (26), a linear actuator (40), a gas cylinder (41), a hydraulic cylinder or any combination thereof.

[0117] Clause 26: A maritime evacuation system (1) according to any of the clauses 21- 25, further comprising a guide arm (45), the guide arm (25) is configured to be moved between an inactive position and an active position.

[0118] Clause 27: A maritime evacuation system (1) according to clause 26, wherein the guide arm (45) is connected the frame (24) via a pivot joint (47) and that the guide arm (45) has an arm turning point (46) at the opposite end compared to the pivot joint (47).

[0119] Clause 28: A maritime evacuation system (1) according to clause 27, wherein the guide arm (45) is configured to guide the first bowsing line (5, 5', 5") from one of the first turning points (22) to the joint (6).

[0120] Clause 29: A maritime evacuation system according to clause 24 and / or 25, wherein the tensioning unit (25) is arranged in a vertical position or a horizontal position.

[0121] Clause 30: A maritime evacuation system (1) according to any of the preceding clauses, wherein the first bowsing line (5, 5', 5") is extending directly from the maritime structure to the joint (6) or it is extending indirectly via one or more turning point(s) and / or split tubes. Clause 31 : A maritime evacuation system (1) according to any of the preceding clauses, wherein the maritime structure (2) comprises a deck (12) and a side.

[0122] Clause 32: A maritime evacuation system (1) according to clause 31, wherein the evacuation station (13) is arranged on the deck (12) of the maritime structure.

[0123] Clause 33: A maritime evacuation system (1) according to clause 32, wherein the one or more turning points and / or the split tubes are arranged on the side of the maritime structure.

[0124] Clause 34: A maritime evacuation system (1) according to clause 16, wherein the evacuation station (13) comprises a deployment arrangement (16).

[0125] Clause 35: A maritime evacuation system (1) according to any of the preceding clauses, wherein the maritime structure (2) is a vessel such as a passenger ship or ferry.

[0126] Clause 36: A maritime structure (2) such as a vessel comprising a maritime evacuation system (1) according to any of the preceding clauses.

[0127] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises," "comprising," "includes," and / or "including" when used herein specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0128] It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure. Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the system and / or device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0129] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0130] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the inventive concepts being set forth in the following claims.

Claims

Claims1. A maritime evacuation system (1) to be installed on a maritime structure (2), comprising an inflatable, floatable unit (3) configured to be deployed from the maritime structure, the inflatable, floatable unit (3) having a longitudinal extension (e), and a first bowsing system (4) configured to positioning and maintaining an intended position of the inflatable, floatable unit (3) in relation to the maritime structure (2) during evacuation of persons at sea, comprising a first bowsing line (5, 5', 5") extending from the maritime structure to a joint (6), a second bowsing line (7) having a first end (8) and a second end (9), the first end (8) and the second end (9) being connected with the inflatable, floatable unit (3) at a first attachment point (10) and at a second attachment point (11), respectively, the first attachment point (10) is arranged at a distance from the second attachment point (11) in the longitudinal extension (e), the second bowsing line (7) extends from the first attachment point (10) via the joint (6) to the second attachment point (11), wherein the second bowsing line (7) is freely movable in the joint (6).

2. A maritime evacuation system (1) according to claim 1, wherein the second bowsing line (7) partly or fully comprises an elastic material.

3. A maritime evacuation system (1) according to claim 1 and / or 2, wherein a first spring element is arranged between the first end (8) of the second bowsing line and the first attachment point (10) and a second spring element is arranged between the second end (9) of the second bowsing line (7) and the second attachment point (11).

4. A maritime evacuation system (1) according to claim 2, wherein the elastic material is at least arranged near the first end (8) and second end (9) of the second bowsing line (7).

5. A maritime evacuation system (1) according to any of the claims 2 to 4, wherein the elastic material and / or spring elements are being extended during movements of the inflatable, floatable unit (3) so that a restoring force is provided in the elastic material and / or the spring element whereby the elastic or spring will restore the inflatable, floatable unit (3) to its intended equilibrium position.

6. A maritime evacuation system (1) according to any of the preceding claims, wherein the joint (6) comprises a thimble, a block, or similar facilitating that the second bowsing line (7) can move freely in the joint (6).

7. A maritime evacuation system (1) according to any of the preceding claims, wherein the first bowsing line (5, 5', 5") is securely connected with the joint (6).

8. A maritime evacuation system (1) according to any of the preceding claims, wherein maritime evacuation system (1) comprises a second bowsing system (4') arranged at predetermined distance from the first bowsing system (4).

9. A maritime evacuation system (1) according to any of the preceding claims, wherein an evacuation chute (14) or slide is arranged between the maritime structure (2) and the inflatable, floatable unit (3), the evacuation chute (14) or slide is configured to embark people from the maritime structure (2) to the inflatable, floatable unit (3) during evacuation.

10. A maritime evacuation system (1) according to any of the preceding claims, wherein the maritime evacuation system (1) comprises an evacuation station (13) configured to be arranged on the maritime structure (2).

11. A maritime evacuation system (1) according to claim 10, wherein the evacuation station (13) comprises a line dispensing device (20), the line dispensing device (20) is configured to level out pull on the first bowsing line(s) (5, 5', 5") by supplying additional line length between the line dispensing device (20) and the inflatable, floatable unit (3).

12. A maritime evacuation system (1) according to claim 11, wherein the line dispensing device (20) comprises a plurality of first device turning points (22) and a plurality of second device turning points (23), the first device turning points (22) being arranged opposite the second device turning points (23).

13. A maritime evacuation system (1) according to claim 12, wherein the first device turning points (22) are connected with a frame (24), and the second device turning points (23) are connected with a tensioning unit (25).

14. A maritime evacuation system (1) according to claim 13, wherein the tensioning unit (25) comprises a number of springs (26), a linear actuator (40), a gas cylinder (41), a hydraulic cylinder or any combination thereof.

15. A maritime evacuation system (1) according to any of the claims 11-14, further comprising a guide arm (45), the guide arm (45) is configured to be moved between an inactive position and an active position.

16. A maritime evacuation system (1) according to claim 15, wherein the guide arm (45) is connected the frame via a pivot joint (47) and that the guide arm (45) has an arm turning point (46) at the opposite end compared to the pivot joint (47).

17. A maritime evacuation system (1) according to claim 16, wherein the guide arm (45) is configured to guide the first bowsing line (5, 5', 5") from one of the first turning points (22) to the joint (6).

18. A maritime evacuation system (1) according to claim 16 and / or 17, wherein the arm turning point (46) is rotatably arranged in relation to a longitudinal axis (48) of the guide arm (45).

19. A maritime evacuation system (1) according to any of the preceding claims, wherein the first bowsing line (5,5', 5") is extending directly from the maritime structure (2) to the joint (6) or it is extending indirectly via one or more turning point(s) and / or split tubes.

20. A maritime structure (2) such as a vessel comprising a maritime evacuation system (1) according to any of the preceding claims.

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