Caulker's name for the seam in the upper deck planking next to a ship's waterways. There was very little space to get at this seam, making it a difficult and awkward job. This is the origin of the expression "Between the devil and the deep blue sea, since ...

A navigational instrument which provides a bearing to a radio beacon.

Unlit navigational aids for use during the day. They mark a bearing to a channel when they are lined up one above the other. Leading lights are lighted at night and serve the same purpose.

The after section of the propeller shaft.

A slot into which the bolt rope or lugs in the luff of the sail are inserted to attach the sail.

Above this pressure, the system may rupture or burst.

The difference between magnetic north and true north, measured as an angle. Magnetic variation is different in different geographic locations, so the nearest compass rose to each location on a chart must be used.

Covers for closing up hatchways.

A small vessel fitted for towing.

A form of wear in which seizing or tearing of the gear or bearing surface occurs.

A portable generator which can be attached to a refrigerated container to power the refrigeration unit during transit.

A boat which uses the wind as its primary means of propulsion.

An analytical method of assessing machine health by quantifying and examining ferrous wear particles suspended in the lubricant or hydraulic fluid.

Towards the center line of a ship (towards the center).

The opening up the back (aft) edge of the mast in which the mainsail luff rope slides when it is hoisted. Some masts have an external sail track.

The one who steers the boat.

The consolidation of a quantity of individual items into one large shipping unit for easier handling.- Loading one or more large items of cargo onto a single piece of equipment, such as a pallet.

A ceremony performed on board ships when passengers or crew are crossing the equator for the first time during a voyage.

Breaking away of a mass of ice from a glacier or iceberg.

Goods transported in a ship, or the money paid for such goods.