Machines in which air or gas is compressed by the mechanical action of rotating vanes or impellers imparting velocity and pressure to the flowing medium. (Raise the pressure of the air by converting the energy from the velocity of the air to pressure.)

The bridge used for taking observations, or directing the handling of the ship.

A small crane that projects over the side of the boat to raise or lower objects (such as smaller boats) from or to the water.

Abbreviation for "With Particular Average."

Small trading vessel also used for exploration. Three-masted, being square-rigged on the two forward masts, and having a lateen rigged mizzen mast. Christopher Colmbus' small squadron, the Santa Maria, Pinta, and Nina, were all Caravels, as were Magellan' ...

The center plank on a wooden deck.

A line used to tighten the leech of a sail, helping to create proper sail shape.

A signboard attached to a daybeacon to convey navigational information presenting one of several standard shapes (square, triangle, rectangle) and colors (red, green, orange, yellow, or black). Daymarks usually have reflective material indicating the sha ...

A floating island of ice. Only one-ninth of the total mass of an iceberg is visible above water level.

Costs that vary directly with the level of activity within a short time. Examples include costs of moving cargo inland on trains or trucks, stevedoring in some ports, and short-term equipment leases. For business analysis, all costs are either defined as ...

Thin strips of wood put around the hatches, to keep the tarpaulin down. Also put upon rigging to keep it from chafing. A large batten widened at the end, and put upon rigging, is called a scotchman.

To windward, in the direction of the eye of the wind; toward the wind; in the direction from which the wind is coming

Small boat carried on the vessel and used in case of emergency.

A platform with or without sides, on which a number of packages or pieces may be loaded to facilitate handling by a lift truck.

Term applied to the direction of the wind when it is favorable to the course being steered.

A bulkhead that will not let water pass from one side of it to the other.

A type of clutch which has a spring loaded jaw or detented rolling element to control torque in an assembly tool.

Forty Foot Equivalent Units (Containers).

When the sheer curves down towards the bow and stern.

Succession of long and unbroken waves that are not due to meteorological conditions in the vicinity. Generally due to wind or storms at a distance from the position.