Erecting the mast on the boat. The Mast Step is a fitting which supports the bottom end of the mast at the deck or keel.

(1) A round eye through which a line is led, usually in order to change the direction of pull. (2) A thick piece of glass set flush in the deck to admit light below.

The forward end of a ship's after superstructure, where the poop deck descends to the upper deck.

(1) Floating, but at mercy of wind and sea. (2) Piercing the hull with a projectile. (3) Taking in sail during a calm.

A unit used to measure the barometric pressure of the atmosphere. 1 millibar equals 0.03 inches of mercury.

A design in which the forestay runs to the top of the mast.

To attach a boat to a mooring, dock, post, anchor, etc.

Confined to an anchorage or haven through being unable to proceed because of stormy weather.

To run a line completely through and out of a block, fairlead, etc.

The left side of a vessel when looking forward.

The side-to-side (athwartship) motion of a vessel.

Pieces of ice, about the size of a small house, that have broken off a glacier.

A person or firm, licensed by the treasury department of their country when required, engaged in entering and clearing goods through Customs for a client (importer).

The quantity of contaminant a filter element can trap and hold before the maximum allowable back pressure or delta P level is reached.

Said of a vessel when she is entirely surrounded by ice.

To trim the sheets in.

A port free of customs duty and most customs regulations.

A slang name for a bullying officer on a ship.

Back pressure.

A white light, usually on the masthead, visible from all directions, used to indicate that a vessel is anchored.