Glossary Archive

A line on the surface of the earth that cuts all meridians at the same angle.  On a standard Mercator chart the rhumb line appears as a straight line

A loop of rope that crosses over itself on a winch drum or cleat, often causing friction or jamming. A riding turn is a term commonly used in the context of rope handling aboard vessels, particularly when dealing with winches, cleats, or other devices used to secure or manage lines. It occurs when a rope...

The system of ropes, cables, chains, and other apparatus used to support and control the sails and masts of a sailing vessel. Rigging is essential to any sailing vessel, enabling the crew to manipulate the sails to harness wind power for propulsion. There are two primary categories of rigging: standing rigging and running rigging. Standing...

Verb - The process of setting up and adjusting the sails, lines, and other necessary equipment on a boat or ship to ensure it is ready for sailing. Rigging refers to preparing a vessel for navigation by arranging and securing its various components, such as sails, ropes (also known as lines), masts, and spars. This...

A vessel that has both a solid part and inflatable part to its structure

An internationally renowned professional institution representing naval architects and marine engineers worldwide. It was founded in 1860 and is based in London, United Kingdom. RINA provides professional accreditation, training, and technical support to individuals and organisations involved in the design, construction, and operation of ships and marine structures. The institution plays a key role in...

The possibility that a collision may occur, usually established by taking a compass bearing of an approaching vessel. Defined in Rule 7 - Risk of Collision of IRPCS.

Flag semaphore indicating the letter R.

International Morse Code sequence representing the letter R.

The volunteer crewed rescue service providing 24-hour rescue services around the UK and Irish coastline. They also provide seasonal lifeguards who look after people on busy beaches. The Royal National Lifeboat Institution (RNLI) is a charitable organisation in the United Kingdom and the Republic of Ireland dedicated to saving lives at sea. Founded in 1824,...