A navigational aid that emits radio waves for navigational purposes. The radio beacon's position is known and the direction of the radio beacon can be determined by using a radio direction finder.

Is energy in transition and is defined in units of Force times Distance. Work cannot be done unless there is movement.

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

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

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.

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

(1) The underside of the hull that sits in the water (2) The ocean floor

The alternating motion of a boat, leaning alternately to port and starboard; the motion of a boat about its fore-and-aft axis.

The volume of a substance passing a point per unit time (e.g., meters per second, gallons per hour, etc.).

The amount of money an ocean carrier pays to the railroad for overland carriage.

Cubic feet per minute. An airflow measurement of volume.

Wide, a wide boat is a beamy boat

A negatively charged ion.

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

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

Old name for bunting from which signal and other flags were made.

To lash up.

Differences between the compass reading and an actual magnetic direction caused by magnetic forces in the vicinity of the compass, which are usually the result of masses of metal, speaker magnets, etc. (2) Vessel departure from specified voyage course.

A shortening of the term, "Roll On/Roll Off." A method of ocean cargo service using a vessel with ramps which allows wheeled vehicles to be loaded and discharged without cranes.

A short spar projecting over the stern of a sailing vessel to sheet the mizzen sail when the mizzen-mast is so far aft that there's not enough room inboard to bring down the sheet and trim the sail. Also, a short spar extending from the stemhead in place ...