{
  "$type": "site.standard.document",
  "description": "A navigation planning system of the present invention comprises a processing circuitry configured to acquire planned route information indicating a movable body on the water; acquire movable body information including a position, a moving direction, and a speed of the movable body; acquire obstacle…",
  "path": "/patents/1386395",
  "publishedAt": "2026-05-13T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01C21/203",
    "FURUNO ELECTRIC CO [JP]"
  ],
  "textContent": "A navigation planning system of the present invention comprises a processing circuitry configured to acquire planned route information indicating a movable body on the water; acquire movable body information including a position, a moving direction, and a speed of the movable body; acquire obstacle information including each of a position, a moving direction, and a speed of a plurality of obstacles located in the surrounding area of the movable body; calculate a collision risk indicating a risk level of collision between the movable body and the obstacle based on the movable body information and the obstacle information; calculate congestion risk indicating a degree of approaching a plurality of obstacles simultaneously based on each of the collision risk between the movable body and the obstacle; and determine the necessity of evasion by comparing the congestion risk with a threshold value.",
  "title": "NAVIGATION PLANNING SYSTEM AND NAVIGATION PLANNING METHOD"
}