A crack or hole that accidentally admits a gas or lets it escape.

A boat owner's private pennant.

A knot used to tie two lines together.

A rail around the mast or on the bulwarks with holes for belaying pins to which lines or halyards are attached.

A drogue or drag device to slow down a boat, hold its bow into the sea in heavy weather, and reduce the boat's drift downwind.

A colorless odorless very poisonous gas formed by the incomplete burning of carbon. Found in some ambient air conditions.

A unit of volume. A US gallon has 231 cubic inches or 3,785 liters.

A mallet used for passing serving around a line.

Abbreviation for "Over, Short or Damaged" Usually discovered at cargo unloading.

Sailing upwind so close to the wind that the forward edge of the sail is stalling or luffing, reducing the power generated by the sail and the angle of heel. Also known as pinching.

The official who is in charge of a harbor, enforcing all its applicable regulations.

Is singular for media and is the material...paper, wire, cellulose or a combination... from which the filter element is made and which does the actual filtration or separation.

(1) Term describing the status of seamen, corresponding to rank in the case of officers. (2) A method of measuring a yacht's expected performance relative to another yacht while racing. Over the years many formulas have been experimented with, in order to ...

Allows foreign merchandise arriving at one port to be transported in bond to another port, where a superseding entry is filed.

The tide with the least variation in water level, occurring when the moon is one quarter and three quarters full. The lowest high tide and the highest low tide occur at neap tide. The opposite is the spring tide.

Ice extending seaward from land to which it is attached.

Rope made of the fibers of the hemp plant and used for small stuff or less than 24 thread (1.75 inch circumference). (Rope is measured by circumference, wire by diameter.)

Order given to a boat's crew when going alongside under oars. Denotes that boat has sufficient way, and that oars are to be placed inside the boat.

An instrument that can be modified or cancelled at any moment without notice to and agreement of the beneficiary, but customarily includes a clause in the credit to the effect that any draft negotiated by a bank prior to the receipt of a notice of revocat ...

To repeat an order for information to the crew.