Abstract: The purpose of the present disclosure is to set the initial information of the anchoring object (target) of a ship with high accuracy. A ship navigation assistance system according to the present disclosure includes a provisional initial information specifier, a measurement sensor and processing circuitry. The provisional initial information specifier may accept a specification of provisional initial information for characteristic information on an object to which a ship anchors or docks (docks to a pier). The measurement sensor may acquire measurement information on an object using a ranging result of an area including the object.

Abstract: The purpose of the present disclosure is to suppress an error which occurs in movement, such as in anchoring a ship. A ship navigation assistance system includes a measurement sensor and a characteristic information updating module. The measurement sensor acquires measurement information on an object using a ranging result of an area including the object that is an anchorage target of a ship. The characteristic information updating module updates characteristic information on the object using initial characteristic information on the object or characteristic information before updating on the object, and the measurement information.

Abstract: A situation display device is provided. The device includes: an observation data acquiring module configured to acquire observation data, and information of observed locations of the observation data; a data selecting module configured to select the observation data within a predetermined range from a course of the device; and a display unit configured to display a location of the device on a bottom side of a display screen, and display the course linearly such that its traveling direction extends upward from the bottom side. The display unit displays, a predetermined area in an upward tapering shape, and displays the selected observation data at a position that indicates a relation between the course and the observed location, the displayed position of the device in the perpendicular direction being corresponding to an offset of the location of the device from the course.

Abstract: A situation display device is provided. The device includes: an observation data acquiring module configured to acquire observation data, and information of observed locations of the observation data; a data selecting module configured to select the observation data within a predetermined range from a course of the device; and a display unit configured to display a location of the device on a bottom side of a display screen, and display the course linearly such that its traveling direction extends upward from the bottom side. The display unit displays, a predetermined area in an upward tapering shape, and displays the selected observation data at a position that indicates a relation between the course and the observed location, the displayed position of the device in the perpendicular direction being corresponding to an offset of the location of the device from the course.