A method and system for controlling a marine vessel is configured to operate a lanyard system to detect at least one fob worn by an individual present on the marine vessel and determine that a missing fob of the at least one fob is no longer detected, wherein the missing fob is either an operator fob or a passenger fob. A man overboard event is generated based on the missing fob, wherein the man overboard event is an operator overboard event if the missing fob includes the operator fob or a passenger overboard event if the missing fob is the passenger fob. One or more search assistance functions are automatically activated based on the man overboard event, wherein the search assistance functions activated depend on whether the man overboard event is the operator overboard event or the passenger overboard event.

The purpose is to provide an image generating device which generates a synthesized image from which one is able to intuitively grasp a relation between an image and a traveling position of a water-surface movable body. The image generating device includes processing circuitry. The processing circuitry acquires attitude information indicative of an attitude of a camera or a ship where the camera is installed. The processing circuitry acquires a traveling route of the ship based on a detection result of at least one of a position and a direction of the ship. The processing circuitry generates traveling route display data based on the attitude information and the traveling route. The processing circuitry generates a synthesized image in which the traveling route display data is synthesized with an image outputted from the camera.

A vessel control system for a marine vessel propelled by at least one propulsion device includes a wireless lanyard system including at least one fob worn by an individual on the marine vessel and a helm transceiver at a helm area of the marine vessel configured to receive radio signals from the at least one fob. A controller is configured to detect, based on communications between each of the at least one fob and the helm transceiver, that each of the at least one fob is present on the marine vessel. A missing fob is detected if at least one of the fobs is no longer detected at the helm transceiver, and then a man overboard event is generated. The vessel control system is configured to automatically activate one or more search assistance functions based on the man overboard event.

Embodiments of the present invention provide a navigation system which, on the one hand, is arranged on sides of the underwater vehicle/AUV and, on the other hand, includes a surface transmitter as a counterpart. The two units communicate with each other such that the surface transmitter emits its signal directed to the position of the underwater vehicle and/or that the surface transmitter follows the underwater vehicle to improve the position determination capability.

Embodiments of the present invention provide a navigation system which, on the one hand, is arranged on sides of the underwater vehicle/AUV and, on the other hand, includes a surface transmitter as a counterpart. The two units communicate with each other such that the surface transmitter emits its signal directed to the position of the underwater vehicle and/or that the surface transmitter follows the underwater vehicle to improve the position determination capability.

The purpose is to provide an image generating device which generates a synthesized image from which one is able to intuitively grasp a relation between an image and a traveling position of a water-surface movable body. The image generating device includes processing circuitry. The processing circuitry acquires attitude information indicative of an attitude of a camera or a ship where the camera is installed. The processing circuitry acquires a traveling route of the ship based on a detection result of at least one of a position and a direction of the ship. The processing circuitry generates traveling route display data based on the attitude information and the traveling route. The processing circuitry generates a synthesized image in which the traveling route display data is synthesized with an image outputted from the camera.

An underwater positioning system comprises a plurality of underwater beacons. A beacon, in response to a signal sent by an underwater vehicle, responds with a signal comprising one or more characteristics to identify the beacon. Components of an access algorithm are provided to the underwater vehicle. The access algorithm determines a location of the beacon based on the beacon's identity. A position of the vehicle is determined based at least in part on the location of the beacon.

An underwater remote locator device for tracking and positioning an object of the present disclosure can include a remote transducer system, abase transducer system, and a navigation module. The remote transducer system can be coupled to an object desired to be tracked. The remote transducer system can include a power source, processing means, acoustic receiver, and an acoustic transmitter. The acoustic transmitter can be configured to transmit a first acoustic wave in one or more directions. The base transducer system can include a processing means, a first base transducer having a first acoustic receiver, a second base transducer having a second acoustic receiver, and a third base transducer having a third acoustic receiver. Each acoustic receiver can be configured to receive said first acoustic wave from the remote transducer system.

A vessel control system for a marine vessel propelled by at least one propulsion device includes a wireless lanyard system including at least one fob worn by an individual on the marine vessel and a helm transceiver at a helm area of the marine vessel configured to receive radio signals from the at least one fob. A controller is configured to detect, based on communications between each of the at least one fob and the helm transceiver, that each of the at least one fob is present on the marine vessel. A missing fob is detected if at least one of the fobs is no longer detected at the helm transceiver, and then a man overboard event is generated. The vessel control system is configured to automatically activate one or more search assistance functions based on the man overboard event.

Embodiments of the present invention provide a navigation system which, on the one hand, is arranged on sides of the underwater vehicle/AUV and, on the other hand, includes a surface transmitter as a counterpart. The two units communicate with each other such that the surface transmitter emits its signal directed to the position of the underwater vehicle and/or that the surface transmitter follows the underwater vehicle to improve the position determination capability.