(1) The edge where the deck joins the hull; top edge of bulwarks. (2) The railing around the deck.

Anchor cable is caught around the fluke or an object is caught around the anchor .

The riding lights required to be carried by vessels at anchor.

A group of points to which rates are made the same as or in relation to rates to other points in group.

Any object used to increase the drag of a boat and slow her down. Typically shaped like a parachute or cone opened underwater, drogues decrease a boat's speed in heavy weather. Also see sea anchor.

A strong tropical revolving storm of force 12 or higher. In the northern hemisphere hurricanes revolve in a clockwise direction. In the southern hemisphere these storms revolve counterclockwise and are known as typhoons.

Where the water and sky or ground and sky appear to intersect.

The curved part of a ship's hull where the side and the flat bottom meet.

Amount of unused space in a ship or a hold by virtue of the irregular shape of the cargo.

To approach something from upwind

The black line parallel with ship's keel marked on the inner surface of the bowl of a compass, indicating the compass direction of the ship's head.

One which blows across a boat's side

The direction of an object (with reference to you, your ship, another object).

A large, flat bottomed boat used to carry the mud from a dredge.

A number system used to describe wind forces and sea conditions from 0 for a flat calm to 12 for a hurricane

Vessel moves to a new area for a new season.

see Watch

Said of a vessel when the depth of water can be measured by the lead (within the 100 fathom curve).

The use of a sound barrier separating the sound from the receiver.

Amount of time for a compressor to complete one cycle.