【正文】
ship automatically to follow the path thus identified。An inertial navigation system(INS)is a navigation aid that uses a puter, motion sensorsand rotation sensors to continuously calculate via dead reckoning the position, orientation, and velocity(direction and speed of movement)of a moving object without the need for external is used on vehicles such as ships, aircraft, submarines, guided missiles, and terms used to refer to inertial navigation systems or closely related devices include inertial guidance system, inertial reference platform, inertial instrument, and many other Electronic Chart Display and Information System(ECDIS)is a puterbased navigation information system that plies with International Maritime Organization(IMO)regulations and can be used as an alternative to paper nautical ECDIS system displays the information from electronic navigational charts(ENC)and integrates position information from the Global Positioning System(GPS)and other navigational sensors, such as radar and automatic identification systems(AIS).It may also display additional navigationrelated information, such as Sailing Directions and provides continuous position and navigational safety system generates audible and/or visual alarms when the vessel is in proximity to navigational Automatic Identification System(AIS)is an automated tracking system used on ships and by Vessel Traffic Services(VTS)for identifying and locating vessels by electronically exchanging data with other nearby ships and VTS information supplements marine radar, which continues to be the primary method of collision avoidance for water Data Recorder, or VDR, is a data recording system designed for all vessels required to ply with the IMO39。s International Convention SOLAS Requirements(IMO (20))in order to collect data from various sensors on board the then digitizes, presses and stores th