Glossary Archive

The side of a vessel or an object that is sheltered from the wind, opposite to the windward side. Leeward is a crucial concept for understanding wind direction and its effects on navigation and vessel handling. The term "leeward" (pronounced "loo-erd") refers to the side of a ship or any object that is away from...

A vessel's sideways drift or deviation from its intended course due to the influence of wind. It is the difference between the direction the vessel is pointing (heading) and the direction it moves over the ground. Leeway is an important consideration for navigational planning and course corrections to ensure the vessel stays on an intended...

A segment of a voyage between two waypoints

The total length of a vessel measured from the foremost point of the bow to the aftmost point of the stern, including any fixed projections. Length Overall (LOA) is a measurement in the marine industry, as it defines the maximum length of a vessel from end to end. This measurement includes any permanent fixtures such...

This flag semaphore signal indicates a change from numbers to letters (Letters to follow). This switches back from numbers to the default encoding, which is letters. It is also the Letter J (Flag Semaphore) between the number signals. A to K are numerals 1 to 9, respectively; J is this shape, Letters to Follow, and...

The RYA Level 1 Start Powerboating course introduces beginners to the basics of powerboat handling. Participants learn low-speed maneuvers, safety checks, and launching and recovering powerboats. Delivered in a practical, hands-on format, this one-day course builds foundational skills and confidence, preparing participants for the Level 2 Powerboat Handling course.

The RYA Level 2 Powerboat Handling course is a comprehensive two-day program that teaches participants the skills needed to operate powerboats confidently and safely. This course covers high-speed maneuvers, docking, navigation, and emergency procedures. Participants practice practical skills such as anchoring, recovering a man overboard, and handling various water conditions. Successful completion allows participants to...

A buoyant, wearable safety device designed to keep a person afloat in the water and reduce the risk of drowning.  A life jacket, also known as a personal flotation device (PFD), is an essential piece of safety equipment used in boating and other water-based activities. It is designed to provide buoyancy and keep the wearer’s...

Personal safety device attached to harness on lifejacket and to vessel strongpoint. Designed to keep you on board

An inflatable or rigid floating device designed to provide emergency refuge and safety for individuals forced to abandon a vessel at sea. A liferaft is an essential piece of safety equipment carried aboard most seagoing vessels, including commercial ships, yachts, and fishing boats. Its primary purpose is to serve as a temporary shelter and flotation...