(1) When two or more boats tie up alongside each other. (2) Overlapping of edges of two ice-floes, so that one floe is partly supported by the other.

Disciplinary code in which maritime crimes and punishments are specified.

The direction and speed of the wind as it appears to those on board, relative to the speed and direction of the boat; combination of the true wind and the wind caused by the boat's movement through the water.

The ratio of the actual water-vapor partial pressure to its saturation pressure at the same temperature. (considered only with atmospheric air).

A vessel is in soundings when she is in sufficiently shallow water for soundings to be made and used as an aid in the vessel's navigation.

Vessel said to be "on her beam ends" when she is lying over so much that her deck beams are nearly vertical.

At or towards the stern or rear of a ship.

An illegal form of discounting or refunding that has the net effect of lowering the tariff price. See also Malpractice.

Speed Over Ground, speed relative to bottom.

Invisible waves in the electromagnetic spectrum that are used to communicate (radio) - and navigate (radar).

A fitting around the propeller shaft to keep the bearing lubricated and to keep water out of the boat.

In navigation, the smaller angle at which two position lines on a chart intersect. The fix will be more reliable as the angle approaches 90

Freight on which transportation charges are calculated on the basis of volume measurement.

A ring or hoop of metal.

The warehouse or public stores to which samples of imported goods are taken to be inspected, analyzed, weighed, etc. by examiners or appraisers.

Is a unit of work equal to 33,000 foot pounds per minute, 550 foot pounds per second, or 746 Watts.

To let go.

An important parameter in establishing an entrained particle's potential to impinge on control surfaces and cause erosion.

A dinghy or raft that can be inflated for use or deflated for easy stowage.

States that equal volumes of all gases under the same conditions of pressure and temperature contain the same number of molecules.