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  1. A small craft or vessel designed to float on, and provide transport over, or under, water.
  2. Naval slang for a submarine of any size.

Related Terms


A float or low, flat-bottomed vessel to float machinery such as cranes, capstans, etc. or to support weights such as floating bridges boat landings, etc.


A narrow hanging staircase used by persons entering or leaving a vessel from the pier or boat


  1. The distance between two meridians at any given parallel of latitude, expressed in linear units, usually nautical miles; the distance to the east or west made good by a craft in proceeding from one point to another. 2. The point at which reckoning of a voyage begins. It is usually established by bearings of prominent landmarks as the vessel clears a harbor and proceeds to sea. When a navigator establishes this point, he is said to take departure. Also called POINT OF DEPARTURE. 3. Act of departing or leaving. 4. The amount by which the value of a meteorological element differs from the normal value.


To keep a boat away from the vessel


A past AMSA initiative to facilitate seafarers transitioning commercial vessel licenses from small domestic craft to international shipping, no longer being progressed.


A free time given to officers and crew of a naval vessel when they are off duty and allowed to disembark and spend time on land.


A naval sailing vessel having the tactical advantage over another by being in a position to windward.


A bearing line to another vessel or object, which does not change over time. An approaching or closing craft is said to be on a steady bearing if the compass bearing does not change and risk of collision therefore exists. Also called CONSTANT BEARING, DECREASING RANGE (CBDR).


A vessel ranging in size from a small boat to a large ship tasked to carry military dispatches from ship to ship, from ship to shore, or, occasionally, from shore to shore.


1) A sailing course that is reaching or running. 2) A vessel is free, when she has a fair wind. 3) A freeing puff allows sheets to be eased, or the sail boat to be pointed higher. 4) When the water has been pumped out of a vessel and she is no longer encumbered.

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