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The difference in level between the bow and the stern of a ship.

A unit of speed equivalent to one nautical mile per hour.

A marking on a ship's hull indicating the maximum safe draft and therefore the minimum freeboard for various water types and temperatures.

A measure of the overall size of a ship determined by calculating the volume of all enclosed spaces of the ship.

The structural backbone of the ship running along the bottom of the hull from bow to stern.

Materials placed in the bilge of a ship to ensure stability.

The vertical distance between the waterline and the bottom of the hull (keel), indicating the deepest part of the ship submerged.

A flat piece of wood, metal or fiberglass used to steer the ship.

The lowest part of a ship's hull, often containing water that has seeped in.

The right side of a ship or boat when facing forward.

The condition of a ship that is carrying cargo; the opposite of 'in ballast'.

The left side of a ship or boat when facing forward.

A vertical partition in the hull of a ship, enhancing structural integrity and compartmentalization for safety.

The leaning to one side of a vessel due to improper loading or external forces.

The rear part of a ship or boat.

An enclosed space in a ship's hull designed to prevent water from passing through in case of a leak.

The navigation center of the ship, usually located on the upper deck.

The part of a ship's structure that is above the main deck.

The weight of the volume of water that a ship displaces when afloat, equal to the ship's mass.

A rotating fan-like structure that propels the ship forward by converting rotational power to thrust.

The front end of a ship or boat.

The main body of the ship that floats on the water.

The measure of a ship's total carrying capacity including bunkers, fresh water, crew, passengers and cargo.

The distance measured from the waterline to the top edge of the deck.