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 andgyrocompasses, provide information to the computer pertaining to the vessel’s position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include, but are not limited to, ships and semi-submersible mobile offshore drilling units (MODU), oceanographic research vessels and cruise ships.

The computer program contains a mathematical model of the vessel that includes information pertaining to the wind and current drag […]

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ABAFT – Toward the rear (stern) of the boat. Behind.

ABEAM – At right angles to the keel of the boat, but not on the boat.

ABOARD – On or within the boat.

ABOVE DECK – On the deck (not over it – see ALOFT)

ABREAST – Side by side; by the side of.

ADRIFT – Loose, not on moorings or towline.

AFT – Toward the stern of the boat.

AGROUND – Touching or fast to the bottom.

AHEAD – In a forward direction.

AIDS TO NAVIGATION – Artificial objects to supplement natural landmarks indicating safe and unsafe waters.

ALEE – Away from the direction of the wind. Opposite of windward.

ALOFT – Above the deck of the boat.

AMIDSHIPS – In or toward the center of the […]