An electrical depth sounder or fish finder that uses sound echoes to locate the depth of objects in water. It does so by timing the sound pulses.

When all the sails are shaking.

A line used for suspending articles.

A ton on which the shipment is freighted. If cargo is rated as weight or measure (W/M), whichever produces the highest revenue will be considered the revenue ton. Weights are based on metric tons and measures are based on cubic meters. RT=1 MT or 1 CBM.

A compartment having a watertight bulkhead at each end.

Also VMG. Actual boat speed after adjusting for such factors as current and leeway.

1,000 board feet. One MBM equals 2,265 C.M.

A day for general ship cleaning.

A condition where the particles (dust) becomes embedded in the fabric filter over time and are not removed by the bag cleaning process.

The principal sail that is set on the main mast.

Boards used to close the companionway.

A suitable beach, being steep and sandy, where ships could be careened for cleaning or repair.

The small triangular space found at the intersection of lines of position on a chart when a ship's position is determined by taking three bearings.

The Captain of a vessel. Highest officer aboard ship. Oversees all ship operations. Keeps ships records. Handles accounting and bookkeeping. Takes command of vessel in inclement weather and in crowded or narrow waters. Handles communications.

Abbreviation for "Not Elsewhere Specified."

Warehouse Withdrawal for Transportation Immediate Exportation.Allows merchandise that has been withdrawn from a bonded warehouse at one U.S. port to be exported from the same port exported without paying duty.

Sea water used for ballast, let into the double bottom, or into a water-ballast tank, or trimming tanks.

In the days of tall ships the barometer was a glass vessel with a thin stem. The fluid in the glass (in most cases water) would move up and down the stem as the pressure of the surrounding atmosphere changed. These movements were used to predict changes i ...

An order meaning sufficient (enough).

An offer to sell goods at a stated price and under stated terms.