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Dynamic positioning (DP) is a computer-controlled system to automatically maintain a vessel's position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors and gyrocompasses , provide information to the computer pertaining to the vessel's position and the magnitude and ...
Hydroacoustic Position Reference is a system to measure the relative position between a transmitter and a receiver under water. It is sometimes used for vessels with dynamic positioning to either measure the relative position between a fixed underwater transmitter or to a mobile under water vehicle (for example ROV).
The International Terrestrial Reference System (ITRS) describes procedures for creating reference frames suitable for use with measurements on or near the Earth's surface. This is done in much the same way that a physical standard might be described as a set of procedures for creating a realization of that standard.
USBL (ultra-short baseline, also known as SSBL for super short base line) is a method of underwater acoustic positioning. A USBL system consists of a transceiver, which is mounted on a pole under a ship, and a transponder or responder on the seafloor, on a towfish, or on an ROV. A computer, or "topside unit", is used to calculate a position ...
A local positioning system (LPS) is a navigation system that provides location information in all weather, anywhere within the coverage of the network, where there is an unobstructed line of sight to three or more signaling beacons of which the exact position on Earth is known.
Dynamic positioning (DP) is a computerised system which allows vessels to maintain a certain position or heading by controlling the thrust produced by the vessel's thrusters and propellers.
CSV Skandi Singapore departing Fremantle, Australia. A diving support vessel is a ship that is used as a floating base for professional diving projects. [1] Basic requirements are the ability to keep station accurately and reliably throughout a diving operation, often in close proximity to drilling or production platforms, for positioning to degrade slowly enough in deteriorating conditions to ...
In 1981, acoustic positioning was proposed as part of the U.S. military's MX missile system. [10] A network of 150 covert transponder fields was envisioned. Submarines typically are guided by inertial navigation systems, but these dead reckoning systems develop position drift which must be corrected by occasional position fixes from a GNSS system.