A stationary, spirally shaped passage that converts velocity head to pressure.

A rail around the mast or on the bulwarks with holes for belaying pins to which lines or halyards are attached.

The power output of a device under specific or nominal operating conditions.

The amount (percent) of light that is reflected by a surface relative to the amount that strikes it.

A small vessel fitted for towing.

A wheel that is designed to use the weight and/or force of moving water to turn it, primarily to operate machinery or grind grain.

To make life onboard for the crew as uncomfortable as possible, by keeping them at work at all hours, often unnecessarily.

A call option with an exercise price below the price of the underlying instrument (e.g..

A seat or brace running laterally across the width of a rowing boat.

Abbreviation for "Over, Short or Damaged" Usually discovered at cargo unloading.

Ties used to tie up the sails when they are furled to the boom or yards.

An aluminum foil fabricated insulator with backings applied to provide a series of closed air spaces with highly reflective surfaces.

Above sea level

Completely filled with water.

This is an insurance policy purchased by a seller to provide protection against non-payment by a buyer due to insolvency or political/economic turmoil in the buyers country.

A rain gauge which automatically records the amount of precipitation collected, as a function of time.

A light sail, such as a spinnaker, used to make the most of light following winds.

Man employed in unloading ships in harbour, or in taking a ship from one port to another. Paid "lump" sum for services.

A transducer for converting thermal energy directly into electrical energy. It is composed of pairs of thermocouples which are connected either in series or in parallel. Thermopiles are used in thermoelectric radiation instruments when the output of a sin ...

A protective cover wrapped around the mast at the deck on a keel stepped boat to prevent water from entering the boat.