A short-sea vessel which transfers cargo between a central "hub" port and smaller "spoke" ports.

A new letter of credit issued to another beneficiary on the strength of a primary credit. The second L/C uses the first L/C as collateral for the bank. Used in a three-party transaction.

An irrevocable letter issued for a specific amount; renews itself for the same amount over a given period.

A lower-than-usual tariff rate assessed because a shipper offers a greater volume than specified in the tariff. The incentive rate is assessed for that portion exceeding the normal volume.

A naval rank next below that of admiral.

Maintaining position over the ground when underway in a river or tidal stream.

The relationship of flow per unit area to differential pressure across a filter medium.

Seaman's term for the period of work on board ship for which he has been paid in advance when signing on.

The center plank on a wooden deck.

Gallons per minute

Direction from which the wind is blowing; an unsailable sector between close hauled headings.

When the wind shifts toward the bow. Opposite of lifted.

A triangular fore-and-aft sail carried on a stay. A sail that is set on a stay, and not on a yard or a mast. On a cutter this is the sail located between the jib and the main sail

A filter unit that combines three principles to filter out oil aerosols: 1) Direct interception - A sieving action, 2) Inertial impaction - Collision with filter media fibers, 3) Diffusion -Particles travel in a spiral motion, presenting an effective fron ...

An agreement to hold a carrier harmless with regard to a liability.

When the sheer curves down towards the bow and stern.

A sail set forward of the foremast on the headstay; a foresail

The position of a flag when lowered halfway down.

A propeller that can have the pitch of its blade changed to reduce drag when not in use.

A list of navigational lights arranged in geographical order, giving the position and characteristics.