A wooden lattice-work covering a hatch or the bottom boards of a boat; similarly designed gratings of metal are frequently found on shipboard.

A rotating fitting used to keep a line from tangling.

A concrete foundation with lateral supports which rests upon a number of steel springs. Designed to deal with disturbing frequencies in vibration isolation

Filter, Regulator and lubricator sometimes combined in one unit

The direction and speed of the wind as it appears to those on board, relative to the speed and direction of the boat; combination of the true wind and the wind caused by the boat's movement through the water.

Beneath the deck

On or near the line of immersion of a ship's hull.

Vessel said to be "on her beam ends" when she is lying over so much that her deck beams are nearly vertical.

Hauled out of the water for repairs or storage

To put a narrow piece of canvas around it after it has been wormed, and before it has been served.

A motor controller that regulates the air flow through an end plate into the motor to control the speed and power. A speed regulation device built into or attached externally.

At or towards the stern or rear of a ship.

A control line that adjusts tension along the foot of the sail, pulling the clew away from the tack; used to maintain proper sail shape.

is the design (built-in) compression ratio for a rotary unit having this feature

A bearing 180

Any point of sailing away from the wind.

The shape of the fore-body of a ship as it thrusts through the sea. A vessel with a slim bow is said to have a fine entry.

Go to bed without undressing.

The direction at right angles to a ship's heading or the line of her keel

The top of a wave.