The invention relates to a method and system for path planning of a wave glider, comprising acquiring historical navigation data of the glider and an underwater vehicle via a shore-based monitoring center; fitting historical navigation data nonlinearly by a deep learning neural network to obtain a trained network; acquiring real-time navigation data of the glider at an off-line end, real-time navigation data and predetermined shipping track data of the vehicle; obtaining the set of off-line optimized path planning schemes of the glider by the above data and the trained network; and determining an optimal path planning scheme of the glider by the deep learning neural network according to real-time data and constraint data of the glider at the on-line end. The invention can reasonably plan the path of the glider and ensure continuous and reliable information interaction between the glider and the vehicle.

The invention relates to a method and system for path planning of a wave glider, comprising acquiring historical navigation data of the glider and an underwater vehicle via a shore-based monitoring center; fitting historical navigation data nonlinearly by a deep learning neural network to obtain a trained network; acquiring real-time navigation data of the glider at an off-line end, real-time navigation data and predetermined shipping track data of the vehicle; obtaining the set of off-line optimized path planning schemes of the glider by the above data and the trained network; and determining an optimal path planning scheme of the glider by the deep learning neural network according to real-time data and constraint data of the glider at the on-line end. The invention can reasonably plan the path of the glider and ensure continuous and reliable information interaction between the glider and the vehicle.

Provided is a water track marker (1) for marking a sports track, such as a water ski track, on a water surface (20). The water track marker comprises at least a first marker ejector (11) configured to eject marker projectiles (2) towards the water for creating an instant marking (3) on the water surface (20) upon impact with the water surface (20). Provided is also a method for marking a sports track and a towing boat comprising said water track marker.

Provided is a water track marker (1) for marking a sports track, such as a water ski track, on a water surface (20). The water track marker comprises at least a first marker ejector (11) configured to eject marker projectiles (2) towards the water for creating an instant marking (3) on the water surface (20) upon impact with the water surface (20). Provided is also a method for marking a sports track and a towing boat comprising said water track marker.

The invention relates to a buoy comprising a buoyant, plastic core component, and a plurality of detachable flotation components that support and surround the core component. The buoy is preferably more than 2.5 metres diameter, but the diameter of the core component is preferably less than or equal to 2.35 metres diameter. This facilitates transport in a single shipping container. A novel tie bar assembly and novel lifting/mooring mounts are also disclosed.

The invention relates to a buoy comprising a buoyant, plastic core component, and a plurality of detachable flotation components that support and surround the core component. The buoy is preferably more than 2.5 metres diameter, but the diameter of the core component is preferably less than or equal to 2.35 metres diameter. This facilitates transport in a single shipping container. A novel tie bar assembly and novel lifting/mooring mounts are also disclosed.

A navigation device is provided, which may include an acquiring module and a route creating module. The acquiring module may acquire at least a departing location, a destination location and nautical chart information to be used for creating a traveling route for a ship. When a given navigable area is divided into a first navigable area and a second navigable area based on a given condition, the route creating module may create a route being shorter in total distance and taking priority in passing the first navigable area than the second navigable area, based on the departing location, the destination location, and the nautical chart information.

A mooring system including a plurality of connected floats and weights being positively buoyant on a water surface and being negatively buoyant at a depth below the water surface. The mooring system also includes a trigger mechanism arranged to reduce the buoyancy of a portion of the connected floats and weights from a being positively buoyant to negatively buoyant to cause the portion of the connected floats and weights to sink below the water surface where the trigger mechanism changes the buoyance of the portion of the connected floats and weights by either adding a weight to one end or separating the end from a buoyant element.

A mooring system including a plurality of connected floats and weights being positively buoyant on a water surface and being negatively buoyant at a depth below the water surface. The mooring system also includes a trigger mechanism arranged to reduce the buoyancy of a portion of the connected floats and weights from a being positively buoyant to negatively buoyant to cause the portion of the connected floats and weights to sink below the water surface where the trigger mechanism changes the buoyance of the portion of the connected floats and weights by either adding a weight to one end or separating the end from a buoyant element.

A vessel mounted multi-directional signal assembly includes a multi-directional signal display assembly comprising a plurality of signal display panels. Each of the plurality of signal display panels comprising at least one display surface, and a plurality of signal indicia are affixed onto different ones of each of the plurality of display surfaces. A signal support assembly is provided such that the multi-directional signal display assembly is disposable into a deployed orientation about the signal support member. A vessel mount assembly is operatively interconnected to the signal support assembly and comprises a mount member to facilitate deployment of the multi-directional signal display assembly on the vessel.