On the sea floor, a relatively narrow, deep depression with steep sides, the bottom of which generally has a continuous slope.

Related Terms

SHELL PLATING

The plates forming the outer side and bottom skin of the hull

FARDAGE

A wood placed in bottom of ship to keep cargo dry

GROUND SWELL

A long, deep swell or undulation of the ocean often caused by a long-continued gale and sometimes a seismic disturbance and felt even at a remote distance. In shallow water the swell rises to a prominent height.

HOLDING GROUND

The bottom ground of an anchorage. The expression is usually used with a modifying adjective to indicate the quality of the holding power of the material constituting the bottom

PLAIN

On the sea floor, a flat, gently sloping or nearly level region. Sometimes called ABYSSAL PLAIN in very deep water.

UP FLOW

The operation of an ion-exchange unit in which solutions are passed in at the bottom and out at the top of the container.

FOOT

1. the lower edge of any sail. 2. the bottom of a mast. 3. a measurement of 12 inches.

DAVY JONES LOCKER

An idiom for the bottom of the sea.

BREAM

To clean a ship's bottom by burning off seaweed

BUOYED UP

Lifted by a buoy, especially a cable that has been lifted to prevent it from trailing on the bottom.

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