Tokimec Inc.

Tokyo Keiki Inc.

Tadashige Hakoyama

Osamu Yagi

Yoshio Kato

Hideo Yamaguchi

Satoki Maeda

A ship navigation assisting device includes: an area setterthat sets, for a target ship, a polygonal safe navigation area defined by a plurality of vertices and surrounding the target ship; a collision point calculatorthat 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 calculatorthat connects the plurality of collision points calculated by the collision point calculatorto calculate a collision danger area.

Ship navigation assisting device

A navigation supporting display apparatus makes it easy for an operator of ship to navigate with a safe passing distance between own ship and a target by indicating an exact danger area between own ship and the target ship. The apparatus has a collision point calculator which calculates a possible collision point of each of the vertexes of a polygonal safe passing region set around own ship, and the target ship, from a relative position of the target ship, a velocity vector of the target ship and a velocity of own ship. The apparatus has an own-ship-mapping-position calculator which calculates a position at which own ship would be located when each of the vertexes places on the collision point, and defines the position as a own-ship-mapping-position. The apparatus further has a danger area calculator which determines lines joining own-ship-mapping-positions corresponding to the collision points with each other to define a danger area. The relation between connected own-ship-mapping-positions and the own-ship-mapping-positions are output to a display device, and the display device displays the area defined by the lines joining own-ship-mapping-positions as a danger area together with the position and the vector of own ship and the position of the target ship.

Growing community of inventors

Tokyo, Japan

Tadashige Hakoyama