{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A ship navigation assisting device includes: an area setter 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 that calculates, based on a speed of the own ship, a relative position between…",
  "path": "/patents/1280232",
  "publishedAt": "2020-12-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G08G3/02",
    "TOKYO KEIKI INC."
  ],
  "textContent": "A ship navigation assisting device includes: an area setter 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 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 that connects the plurality of collision points calculated by the collision point calculator to calculate a collision danger area.",
  "title": "SHIP NAVIGATION ASSISTING DEVICE"
}