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The speed of a vessel adjusted to that of a pilot boat at which the pilot can safely embark



Related Terms

PILOT BOAT

A small vessel used by the pilot to go or from a vessel employing his services. Also called PILOT VESSEL.

BILL OF HEALTH

The Bill of Health is the certificate issued by local medical authorities indicating the general health conditions in the port of departure or in the ports of call. The Bill of Health must have been advised before departure by the Consul of the country of destination. When a vessel has free pratique, this means that the vessel has a clean Bill of Health certifying that there is no question of contagious disease and that all quarantine regulations have been complied with, so that people may embark and disembark.

DUTCHMAN'S LOG

A buoyant object thrown overboard to determine the speed of a vessel; the time required for a known length of the vessel to pass the object is measured, and the speed can then be computed.

DROP BACK

To increase the distance to the vessel ahead by reducing one ́s own speed

DRIVE

1) To press a vessel with high speed for the conditions. 2) To carry much sail in a heavy wind. 3) The entire mechanism connecting the engine to the propeller, i.e., inboard-outboard drive, reduction-gear drive, direct drive, etc.

DISPATCH BOAT

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.

PILOT

A Navigator, specially knowledgeable person qualified to navigate a vessel through difficult waters, e.g. harbour pilot etc.

SHALLOW WATER EFFECT

The effect that due to the depth of water, the speed of the vessel and shape of the vessel's hull causes the vessel to sink deeper in the water especially in shallow water and at high speed. The vessel becomes sluggish in responding to the rudder.

UNFAVORABLE CURRENT

A current flowing in such a direction as to decrease the speed of a vessel over the ground.

MANEUVERING SPEED

A vessel ́s reduced rate of speed in restricted waters such as fairways, harbours, etc.

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