A metal pin by which the plating and other parts of iron and steel vessels are joined. Rivets are known by their heads, such as: Flush, pan, snap, plug, tap, countersunk, mushroom, and swollen neck.

On a square-rigged ship, a small triangular sail set above the skysail in fair weather. A square version is called a Moonraker.

Small lines used to tie the sails when they are flaked or furled.

Shallow keels, usually placed in conjunction with or in place of a center keel. Attached to each side of a vessel, they provide lateral resistance and stability, as well as support the weight of the hull of the ship on the ways when launching, or when in ...

The part of a block which is opposite the swallow, which is where the line enters.

A signal which is hoisted during a sailing race to protest the actions of another (for rules infractions)

The tensile or compressive loading on the crosshead assembly with compressive piston rod loading on the outward stroke and tensile piston rod loading on the inward stroke.

Hit by a wave over the stern; having a wave wash over the stern of the boat. This can be a very dangerous situation.

Alert (pep it up!).

The practically steady winds blowing toward the equator, N.E. in the northern and SE. in the southern hemisphere.

To calculate your position using time, the position of celestial bodies, and mathematical tables. Position is determined by measuring the apparent altitude of one of these objects above the horizon using a sextant and recording the times of these sighting ...

An audible or visual discharge at a pressure slightly lower than the set pressure on a valve. Warns the operator that the valve is about to open.

A multihull with two hulls separated by a deck or crossbeams from which a trampoline is suspended; abbreviated "cat."

Small charts showing tidal stream directions and rate of flow.

A rail car without a roof and walls.

A small receiver fitted on the inlet or discharge of a reciprocating compressor. The device is designed to remove the resonance from the compressor thereby reducing noise.

Voyage made in varying directions. To sail in various directions for pleasure, in search, or for exercise.

A strong vertical post used to attach lines for towing or mooring.

Water which runs down and collects in the bilges of a ship and usually becomes foul and noxious.

Present a rate proposal to a conference meeting for adoption as a conference group rate.