Ship navigation assisting device
AssigneeTokyo Keiki Co., Ltd.
InventorsTadashige Hakoyama, Osamu Yagi
Life of this patent
Estimating the term…
Abstract
A ship navigation assisting device includes: an area setter 304 that sets, for a target ship, a polygonal safe navigation area defined by a plurality of vertices and surrounding the target ship; a collision point calculator 305 that calculates, based on a speed of the own ship, a relative position between the own ship and the target ship, and a velocity vector of the target ship, collision points between each of the plurality of vertices constituting the safe navigation area and the own ship; and a collision danger area calculator 306 that connects the plurality of collision points calculated by the collision point calculator 305 to calculate a collision danger area.
Claims3
A ship navigation assisting device that calculates a collision danger area between own ship and a target ship to assist the navigation of the own ship, comprising:
- a processor configured to:
- set, for the target ship, a polygonal safe navigation area defined by a plurality of vertices and surrounding the target ship;
- calculate, based on a speed of the own ship measured by a global navigation satellite system (GNSS) sensor on the own ship, a relative position between the own ship and the target ship, and a velocity vector of the target ship, a plurality of collision points between each of the plurality of vertices constituting the polygonal safe navigation area and the own ship, wherein the relative position between the own ship and the target ship is calculated based on a position of the own ship measured by the GNSS sensor and a position of the target ship measured by a radar device and the velocity vector of the target ship is measured by the radar device;
- and
- connect the plurality of collision points to one another to calculate the collision danger area.
Dependencies are inferred from the claim text.