Ship information collection device, ship information collection system, and ship information collection method

Abstract

[Problem] To provide a ship information collection device that enables easy collection of navigation data of an other ship while reducing the communication data volume. [Solution] A ship information collection device comprises: an acquisition unit that sequentially acquires navigation data of an other ship present in the periphery of a ship detected by a detection device mounted in the ship; a determination unit that determines whether or not the navigation data of said other ship is to be included in a transmission data set which is sequentially transmitted to a data collection server; and a generation unit that generates the transmission data set which includes the navigation data of said other ship.

Description

[Technical Field]

[0001] The present invention relates to a ship information gathering device, a ship information gathering system, and a ship information gathering method. [Background technology]

[0002] Patent document 1 describes a method in which navigation data and engine data are automatically collected and stored in an onboard server via an onboard LAN system from ship equipment, and the navigation data and engine data are integrated and displayed on an onboard computer; the navigation data and engine data stored in the onboard server are transferred and stored in a portal site server via a satellite communication system; the accumulated navigation data and engine data are obtained by a management computer via an Internet line; and the navigation data and engine data are integrated and displayed on the management computer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-198136 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, while it is useful to collect ship navigation data such as AIS (Automatic Identification System) data for investigating and analyzing ship accidents, it is difficult to collect all navigation data due to issues such as the cost of using satellite communication lines and communication speed.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its main purpose is to provide a ship information collection device, a ship information collection system, and a ship information collection method that make it easy to collect navigation data of other ships while reducing the amount of communication data. [Means for solving the problem]

[0006] In order to solve the above problem, one aspect of the present invention is a ship information collection device that includes an acquisition unit that sequentially acquires navigation data of other ships around the ship detected by a detection device installed on the ship, a decision unit that determines whether the navigation data of the other ships should be included in a transmission data set that is sequentially transmitted to a data collection server, and a generation unit that generates the transmission data set including the navigation data of the other ships. This makes it easy to collect navigation data of other ships while minimizing the amount of communication data.

[0007] In the above aspect, the system may further include a risk calculation unit that calculates a collision risk value representing the risk of collision between the ship and the other ship based on the ship's navigation data and the other ship's navigation data, and the decision unit may decide whether to include the other ship's navigation data in the transmission data set in accordance with the collision risk value. This makes it possible to include the navigation data of other ships with a relatively high risk of collision in the transmission data set.

[0008] In the above aspect, the determination unit may determine the frequency with which the voyage data of the other ships is to be included in the transmission data set in accordance with the collision risk value, thereby increasing the frequency with which the voyage data of other ships with a relatively high risk of collision is to be included in the transmission data set.

[0009] In the above aspect, the system may further include a distance calculation unit that calculates the inter-ship distance between the ship and the other ship based on the ship's navigation data and the other ship's navigation data, and the determination unit may determine whether or not to include the other ship's navigation data in the transmission data set depending on the inter-ship distance. This makes it possible to include the navigation data of other ships with a relatively short inter-ship distance in the transmission data set.

[0010] In the above aspect, the determining unit may determine the frequency with which the navigation data of the other ships is to be included in the transmission data set depending on the inter-ship distance, thereby increasing the frequency with which the navigation data of other ships with a relatively short inter-ship distance are to be included in the transmission data set.

[0011] In the above aspect, the navigation data of the other ship may be AIS data. The generator may include a predetermined type of the AIS data in the transmission data set, and not include the remaining types of data in the transmission data set. This makes it possible to reduce the amount of communication data while including desired types of data in the transmission data set.

[0012] In the above aspect, the generation unit may include the remaining types of data in the transmission data set when there is a change in the remaining types of data, thereby making it possible to include the remaining types of data in the transmission data set when there is a change.

[0013] In the above aspect, the determination unit may determine the frequency of including the voyage data of the other ships in the transmission data set depending on the speed of the ship, thereby making it possible to increase the frequency of including the voyage data of the other ships in the transmission data set when, for example, the speed of the ship is high.

[0014] In the above aspect, the determining unit may determine the frequency with which the voyage data of the other ships is to be included in the transmission data set depending on the type of the ship, thereby increasing the frequency with which the voyage data of the other ships is to be included in the transmission data set, for example, for a relatively large ship.

[0015] In the above aspect, the vessel may further include a congestion determination unit that determines the degree of congestion in the sea area in which the vessel is navigating, and the determination unit may determine the frequency at which the navigation data of the other vessels is to be included in the transmission data set depending on the degree of congestion. This makes it possible to increase the frequency at which the navigation data of the other vessels is to be included in the transmission data set, for example, when the degree of congestion is relatively high.

[0016] In the above aspect, the determining unit may determine the frequency with which the navigation data of the other ships is to be included in the transmission data set depending on the sea area that the ship is sailing in. This makes it possible to increase the frequency with which the navigation data of the other ships is to be included in the transmission data set, for example, when the ship sails in a predetermined sea area.

[0017] In the above aspect, the determination unit may include the navigation data of the other ships in the transmission data set more frequently when the ship is navigating in coastal waters than when the ship is navigating in offshore waters. This makes it possible to increase the frequency at which the navigation data of the other ships is included in the transmission data set when the ship is navigating in coastal waters.

[0018] In another aspect of the present invention, the ship information collection system includes a detection device mounted on a ship and sequentially detecting navigation data of other ships present around the ship, a decision unit that decides whether to include the navigation data of the other ships in a transmission data set, a generation unit that generates the transmission data set including the navigation data of the other ships, a communication device that sequentially transmits the transmission data set, and a data collection server that collects the transmitted transmission data set. This makes it easy to collect navigation data of other ships while minimizing the amount of communication data.

[0019] In another aspect of the present invention, a ship information collection method includes a detection device mounted on a ship that sequentially detects navigation data of other ships around the ship, determines whether to include the navigation data of the other ships in a transmission data set, generates the transmission data set including the navigation data of the other ships, sequentially transmits the transmission data set using a communication device, and collects the transmitted transmission data set using a data collection server. This makes it easy to collect navigation data of other ships while minimizing the amount of communication data. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a ship information collection system. [Figure 2]FIG. 1 is a diagram illustrating an example of the configuration of a shipboard system. [Figure 3] FIG. 2 is a diagram illustrating an example of the configuration of a ship information collection device. [Figure 4] FIG. 10 is a diagram illustrating an example of a procedure for a ship information collection method. [Figure 5] FIG. 1 is a diagram for explaining CPA. [Figure 6] FIG. 1 is a diagram for explaining an OZT. [Figure 7] FIG. 2 is a diagram for explaining the distance between ships. [Figure 8] FIG. 10 is a diagram showing a modified example of step S15. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0022] 1 is a diagram showing an example of the configuration of a vessel information collection system 100. The vessel information collection system 100 includes an onboard system 100 mounted on a vessel SH, and a data collection server 200 installed on land.

[0023] The shipboard system 100 and the data collection server 200 can communicate with each other via satellite communication using a satellite ST. However, the communication is not limited to this, and wireless communication using, for example, ultra-high frequency waves, very high frequency waves, short frequency waves, or medium frequency waves may also be used.

[0024] Figure 2 is a block diagram showing an example configuration of the shipboard system 100. In the following description, the ship on which the shipboard system 100 is installed is referred to as the "own ship," and other ships are referred to as "other ships." The shipboard system 100 includes a ship information collection device 1, a VDR (voyage data recording device) 20, a data logger 30, and a communication device 40. Note that the VDR 20 and the data logger 30 may be omitted.

[0025] The shipboard system 100 further includes a radar 3, an AIS 4, a camera 5, a GNSS receiver 6, a gyrocompass 7, and an ECDIS 8. Each device included in the shipboard system 100 is connected to a communication network such as a LAN, and is capable of network communication with each other.

[0026] The ship information collection device 1 is a computer including a CPU, RAM, ROM, non-volatile memory, an input / output interface, etc. The CPU of the ship information collection device 1 executes information processing according to a program loaded from the ROM or non-volatile memory to the RAM.

[0027] The program may be supplied via an information storage medium such as an optical disk or a memory card, or may be supplied via a communication network such as the Internet or a LAN.

[0028] The VDR 20 is connected to a radar 3, an AIS 4, a camera 5, a GNSS receiver 6, a gyrocompass 7, and an ECDIS 8, etc., and acquires navigation data including the ship's own navigation data and navigation data of other ships from these devices and provides it to the ship information collection device 1.

[0029] The data logger 30 is connected to the engine 91, generator 92, etc., and acquires machinery data including log data of these machines and provides it to the ship information collection device 1. The communication device 40 is a communication device for realizing satellite communication via the satellite ST.

[0030] The data logger 30 is also connected to a boiler, a burner, a pump, a propeller, a shaft horsepower, a water maker, an oil purifier, a compressor, a ballast water treatment device, an air conditioner, a level gauge, a ship elevator, a deck crane, and the like.

[0031] The radar 3 emits radio waves around the ship and receives the reflected waves, generating echo data based on the received signals. The radar 3 also identifies targets from the echo data and generates target tracking data (TT data) that indicate the position and speed of the targets.

[0032] The AIS (Automatic Identification System) 4 receives AIS data from other ships around the ship or from land-based control. Instead of AIS, a VDES (VHF Data Exchange System) may also be used. The AIS data includes the identification codes, names, positions, courses, speeds, types, lengths, and destinations of other ships.

[0033] The camera 5 is a digital camera that captures images of the outside from the ship and generates image data. The camera 5 may include an image recognition unit that estimates the position and type of a target, such as a ship, included in the captured image using an object detection model. The image recognition unit is not limited to the camera 5 and may be implemented in other devices, such as the ship information collection device 1.

[0034] The GNSS receiver 6 detects the ship's position based on radio waves received from the GNSS (Global Navigation Satellite System). The gyrocompass 7 detects the ship's heading. A GPS compass may be used instead of a gyrocompass.

[0035] An ECDIS (Electronic Chart Display and Information System) 8 acquires the ship's position from the GNSS receiver 6 and displays the ship's position on an electronic chart. The ECDIS 8 also displays the ship's planned route on the electronic chart. A GNSS plotter may be used instead of an ECDIS.

[0036] In this embodiment, the AIS 4 is an example of a detection device, and the AIS data is an example of the navigation data of other ships. The AIS 4 sequentially detects the AIS data. However, the present invention is not limited to this. The radar 3 may be an example of a detection device, and the TT data may be an example of the navigation data of other ships. Alternatively, the camera 5 may be an example of a detection device, and the identification data identified from the image may be an example of the navigation data of other ships.

[0037] 3 is a block diagram showing an example configuration of the ship information collection device 1. The control unit 10 of the ship information collection device 1 includes a data acquisition unit 11, a data set generation unit 12, a frequency determination unit 13, a risk calculation unit 14, a distance calculation unit 15, and a congestion determination unit 16. These functional units are realized by the control unit 10 executing information processing according to a program.

[0038] The data acquisition unit 11 sequentially acquires AIS data detected by the AIS 4 as navigation data of other ships. The data acquisition unit 11 may acquire the AIS data indirectly from the VDR 20, or may acquire the AIS data directly from the AIS 4.

[0039] Specifically, the data acquisition unit 11 sequentially acquires navigation data recorded in the VDR 20. The navigation data includes navigation data of the ship itself and navigation data of other ships. The navigation data of the ship itself includes, for example, the position, direction, and speed of the ship itself.

[0040] The data acquisition unit 11 also sequentially acquires engine system data including log data of the engine 91, the generator 92, etc. recorded in the data logger 30. Furthermore, the data acquisition unit 11 also sequentially acquires equipment monitoring data for monitoring the operating status of each equipment.

[0041] The data set generator 12 generates a transmission data set including the AIS data as navigation data of other ships. The generated transmission data set is sequentially transmitted by the communication device 40 (see FIG. 2).

[0042] Specifically, the data set generation unit 12 generates a transmission data set including the navigation data, machinery data, and equipment monitoring data acquired by the data acquisition unit 11. The transmission data set may or may not include AIS data.

[0043] 4 is a diagram showing an example of a procedure for processing related to generation of a transmission data set in the ship information collection method realized in the ship information collection system 300. The control unit 10 of the ship information collection device 1 executes the information processing shown in the diagram in accordance with a program.

[0044] First, the control unit 10 acquires navigation data from the VDR 20 (see FIG. 2) (S11, processing as the data acquisition unit 11).

[0045] Next, the control unit 10 acquires engine-related data from the data logger 30 (see FIG. 2) (S12, processing as the data acquisition unit 11).

[0046] Next, the control unit 10 acquires the device monitoring data of each device (S13, processing as the data acquisition unit 11).

[0047] Next, the control unit 10 determines whether or not it is the time to include the AIS data in the transmission data set (S14). The frequency at which the AIS data is included in the transmission data set (for example, once every few seconds, minutes, or tens of minutes) is determined and stored in advance by the control unit 10. The determination of the frequency will be described in detail later.

[0048] If it is the time to include the AIS data in the transmission data set (S14: YES), the control unit 10 generates a transmission data set including the AIS data (S15, processing as the data set generation unit 12).

[0049] On the other hand, if it is not the turn to include the AIS data in the transmission data set (S14: NO), the control unit 10 generates a transmission data set that does not include the AIS data (S16, processing as the data set generation unit 12).

[0050] Next, the control unit 10 performs a transmission process for the generated transmission data set (S17). The transmission data set is transmitted from the communication device 40 (see FIG. 2) to the outside, and is finally collected by the data collection server 200 (see FIG. 1) via satellite communication.

[0051] The control unit 10 repeats the above-described processes of S11 to S17 every time a predetermined time period elapses (S18).

[0052] Returning to the explanation of Figure 3, the frequency determination unit 13 determines whether or not to include AIS data in a transmission data set. Specifically, the frequency determination unit 13 determines how often to include AIS data in a transmission data set. In other words, the frequency determination unit 13 determines whether or not to include AIS data for each transmission data set that is sequentially transmitted.

[0053] The frequency determination unit 13 may determine a frequency based on time, for example, once every few seconds, minutes, or tens of minutes, or may determine a frequency based on the number of times, for example, once every few times. Note that the frequency determination unit 13 may determine that the AIS data is to be included in all transmission data sets, or may determine that the AIS data is not to be included in all transmission data sets.

[0054] The frequency determination unit 13 determines how often AIS data is included in the transmission data set using various techniques described below.

[0055] The risk calculation unit 14 calculates a collision risk value that represents the risk of collision between the ship and another ship based on the navigation data of the ship itself and the navigation data of the other ship. The frequency determination unit 13 determines the frequency at which AIS data is included in the transmission data set according to the collision risk value calculated by the risk calculation unit 14.

[0056] The collision risk value is, for example, TCPA (Time to Closest Point of Approach) / DCPA (Distance to Closest Point of Approach). As shown in Figure 5, TCPA represents the time until the other ship comes closest to the own ship, and DCPA represents the distance when the other ship comes closest to the own ship.

[0057] For example, when at least one of TCPA and DCPA falls below a threshold, the frequency determination unit 13 increases the frequency with which AIS data is included in the transmission data set. For example, the frequency determination unit 13 may gradually increase the frequency with which AIS data is included in the transmission data set as at least one of TCPA and DCPA decreases.

[0058] When there are multiple other ships, i.e., when there are multiple AIS data, the frequency determination unit 13 determines the frequency with which the AIS data is included in the transmission data set for each AIS data. For example, the frequency with which the AIS data of another ship whose collision risk value is higher than a threshold value is included in the transmission data set is higher than the frequency with which the AIS data of another ship whose collision risk value is lower than the threshold value.

[0059] The collision risk value may be calculated based on, for example, OZT (Obstacle Zone by Target). As shown in Fig. 6, in the method of displaying OZT, the risk calculation unit 14 calculates a collision risk value that indicates the risk of collision between the ship and the other ship, for each decision point on the predicted course of the other ship, when it is assumed that the ship changes course and reaches each decision point.

[0060] Specifically, the risk calculation unit 14 calculates the probability that the ship and the other ship will be present at the same time at the judgment point, assuming that the ship changes course from its current position while maintaining its speed and reaches the judgment point, and that the other ship maintains its speed from its current position and reaches the judgment point, as a collision risk value, and displays OZT at judgment points where the collision risk value is above a threshold.

[0061] For example, when an OZT exists on the bow line or planned route of the ship, the frequency determination unit 13 increases the frequency with which AIS data is included in the transmission data set. Alternatively, for example, when an OZT exists within a predetermined distance from the ship, the frequency determination unit 13 may increase the frequency with which AIS data is included in the transmission data set.

[0062] The distance calculation unit 15 calculates the distance between the ship and the other ship based on the navigation data of the ship and the navigation data of the other ship. The frequency determination unit 13 determines the frequency at which AIS data is included in the transmission data set according to the distance between the ships calculated by the distance calculation unit 15.

[0063] 7, the frequency determination unit 13 sets multiple thresholds a1 to a3 for the ship-to-ship distance and gradually changes the frequency at which AIS data is included in the transmission data set. For example, when the distance is 1 nm (nautical mile) or less, the frequency is 15 seconds, when the distance is between 1 nm and 10 nm, the frequency is 1 minute, and when the distance is between 10 nm and 20 nm, the frequency is 5 minutes.

[0064] When there are multiple other ships, i.e., when there are multiple AIS data, the frequency determination unit 13 determines the frequency with which the AIS data is included in the transmission data set for each AIS data. For example, when the inter-ship distance is shorter than a threshold, the AIS data is included in the transmission data set more frequently than when the inter-ship distance is longer than the threshold.

[0065] The congestion determination unit 16 determines the degree of congestion in the sea area in which the ship is navigating. Specifically, the congestion determination unit 16 determines the degree of congestion in the sea area in which the ship is navigating based on the occupancy rate of the slot map of the AIS 4 (see FIG. 2).

[0066] The frequency determination unit 13 determines the frequency with which AIS data is included in the transmission data set according to the congestion degree calculated by the congestion determination unit 16. For example, when the congestion degree of the sea area in which the ship is navigating is higher than a threshold, the frequency with which AIS data is included in the transmission data set is higher than when the congestion degree is lower than the threshold.

[0067] As explained above, by determining the frequency with which AIS data is included in the transmission data set based on the collision risk value, inter-ship distance, or congestion level, it is possible to collect AIS data that is more important from the perspective of accident investigation, etc., while keeping the amount of communication data to a minimum.

[0068] Alternatively, the frequency determination unit 13 may determine the frequency at which AIS data is included in the transmission data set according to the ship speed of the ship. For example, the frequency determination unit 13 may increase the frequency at which AIS data is included in the transmission data set as the ship speed of the ship increases.

[0069] The frequency determination unit 13 may also determine the frequency at which AIS data is included in the transmission data set depending on the ship type of the ship or other ships. For example, the frequency determination unit 13 may increase the frequency at which AIS data is included in the transmission data set as the ship type of the ship becomes larger.

[0070] Furthermore, the frequency determination unit 13 may increase the frequency with which AIS data is included in the transmission data set as the size of the other ship increases, because smaller ships are more maneuverable and their behavior is more difficult to predict.

[0071] The frequency determination unit 13 may also determine the frequency at which AIS data is included in the transmission data set depending on the sea area in which the ship is navigating, which is determined based on electronic chart data.

[0072] For example, when the ship is navigating in coastal waters, the frequency determination unit 13 increases the frequency of including AIS data in the transmission data set compared to when the ship is navigating in offshore waters. In general, more accidents occur in coastal waters than in offshore waters, so it is preferable to increase the frequency in coastal waters from the perspective of accident investigation, etc.

[0073] Conversely, the frequency determination unit 13 may include AIS data in the transmission data set more frequently when the ship is navigating offshore waters than when the ship is navigating coastal waters. In coastal waters, AIS data received by land-based base stations can often be used, so it is preferable to include the frequency less frequently in order to reduce the amount of communication data.

[0074] Various methods for determining the frequency with which AIS data is included in a transmission data set have been described above, but these methods are not limited to being applied alone, and may be applied in appropriate combination.

[0075] Figure 8 is a diagram showing a variation of step S15 in Figure 4. AIS data includes dynamic information that is constantly changing, such as the positions of other ships (Msg 1-3, etc., Msg 18 in Class B, etc.), and static information that is almost unchanged (Msg 5, etc., Msg 24 in Class B, etc.).

[0076] In this example, the control unit 10 of the ship information collection device 1 monitors the static information of the AIS data, and if there is no change in the static information of the AIS data (S151: NO), only the dynamic information of the AIS data is included in the transmission data set, and the static information is not included in the transmission data set (S152).

[0077] On the other hand, if there is a change in the static information of the AIS data (S151: YES), the control unit 10 of the ship information collection device 1 includes not only the dynamic information of the AIS data but also the static information in the transmission data set (S153). Only the part of the static information that has changed may be included in the transmission data set, or all of the static information may be included in the transmission data set.

[0078] In this way, by collecting only dynamic AIS data under normal circumstances and collecting static information when there is a change in the static information, it is possible to collect necessary AIS data while keeping the amount of communication data to a minimum.

[0079] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made by those skilled in the art. [Explanation of symbols]

[0080] 1 Ship information collection device, 3 Radar, 4 AIS, 5 Camera, 6 GNSS receiver, 7 Gyrocompass, 8 ECDIS, 10 Control unit, 11 Data acquisition unit, 12 Data set generation unit, 13 Frequency determination unit, 14 Risk calculation unit, 15 Distance calculation unit, 16 Congestion determination unit, 20 VDR, 30 Data logger, 40 Communication device, 100 Onboard system, 200 Data collection server, 300 Ship information collection system, SH Ship, ST Satellite

Claims

1. an acquisition unit that sequentially acquires navigation data of other ships around the ship detected by a detection device mounted on the ship; a decision unit that decides whether or not the voyage data of the other ships is to be included in a transmission data set that is sequentially transmitted to a data collection server; a generation unit that generates the transmission data set including the voyage data of the other ship; A ship information gathering device comprising:

2. a risk calculation unit that calculates a collision risk value representing a risk of collision between the ship and the other ship based on the navigation data of the ship and the navigation data of the other ship; the determination unit determines whether to include the voyage data of the other ship in the transmission data set according to the collision risk value; The vessel information gathering device according to claim 1.

3. the determination unit determines the frequency with which the voyage data of the other ships is to be included in the transmission data set in accordance with the collision risk value; The vessel information gathering device according to claim 2.

4. a distance calculation unit that calculates a ship-to-ship distance between the ship and the other ship based on navigation data of the ship and navigation data of the other ship; the determining unit determines whether or not to include the voyage data of the other ship in the transmission data set depending on the ship-to-ship distance; The vessel information gathering device according to claim 1.

5. the determining unit determines the frequency of including the voyage data of the other ships in the transmission data set according to the ship-to-ship distance; The vessel information gathering device according to claim 4.

6. The voyage data of the other ship is AIS (Automatic Identification System) data, 6. A vessel information gathering device according to claim 1.

7. The generation unit includes dynamic information of the AIS data in the transmission data set, and does not include static information in the transmission data set. The vessel information gathering device according to claim 6.

8. When the static information is changed, the generation unit includes the static information in the transmission data set. The vessel information gathering device according to claim 7.

9. the determining unit determines the frequency of including the voyage data of the other ships in the transmission data set in accordance with the speed of the ship; 9. A vessel information gathering device according to claim 1.

10. the determining unit determines the frequency of including the voyage data of the other ships in the transmission data set depending on the type of the ship; 10. A vessel information gathering device according to claim 1.

11. A congestion determination unit is further provided to determine the degree of congestion in the sea area in which the ship navigates, the determining unit determines the frequency of including the voyage data of the other ships in the transmission data set according to the congestion degree; 11. A vessel information gathering device according to any one of claims 1 to 10.

12. the determining unit determines the frequency of including the voyage data of the other ships in the transmission data set depending on the sea area in which the ship is navigating; 12. A vessel information gathering device according to any one of claims 1 to 11.

13. the determining unit increases the frequency with which the voyage data of the other ships is included in the transmission data set when the ship is navigating in coastal waters compared to when the ship is navigating in offshore waters; The vessel information gathering device according to claim 12.

14. a detection device mounted on the ship for sequentially detecting navigation data of other ships present around the ship; a decision unit that decides whether to include the voyage data of the other ship in the transmission data set; a generation unit that generates the transmission data set including the voyage data of the other ship; a communication device that sequentially transmits the transmission data set; a data collection server that collects the transmitted data set; A ship information collection system equipped with:

15. By a computer, A detection device mounted on the ship sequentially detects the navigation data of other ships present around the ship; determining whether to include the voyage data of the other vessel in the transmitted data set; generating the transmission data set including the voyage data of the other ship; transmitting the transmission data set sequentially by a communication device; collecting the transmitted data set by a data collection server; Methods of collecting ship information.

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