Glossary Archive

A pyrotechnic distress signal that, when launched, ascends to a high altitude before deploying a parachute to slow its descent while emitting a bright, long-lasting light.  A parachute flare is an essential piece of safety equipment used in marine environments to signal distress and attract attention over long distances, particularly at night or in poor...

Navigational instrument used in conjunction with the compass rose on the chart to transfer bearings and courses to plot a vessel’s position

A journey or route taken by a vessel from one location to another, often across open water or between specific points such as harbours or islands. A passage in maritime terms typically refers to the act of travelling by sea from one point to another. This could involve crossing an ocean, navigating coastal waters, or...

A detailed, structured navigational strategy outlining the safest and most efficient route for a vessel from departure to destination, considering hazards, weather, tides, and regulations.  A passage plan is essential for safe navigation and is a fundamental part of voyage planning. It ensures that all aspects of a journey are considered before departure, reducing risks...

The action or process of a vessel's bow turning away from the wind, often due to wind or rudder adjustments. When a vessel "pays off," it is essentially turning its bow away from the wind direction. This can happen due to intentional steering actions by the helmsman or as a result of external forces such...

To let out a line or rope gradually

The International Maritime Signal Flag Papa. Meaning The Blue Peter.In harbour: All persons should report on board as the vessel is about to proceed to sea.At sea: It may be used by fishing vessels to mean: My nets have come fast upon an obstruction.

Measurement of the geometric strength of satellite configuration in a Global Navigation Satellite System (GNSS) receiver. It quantifies the effect of satellite geometry on the accuracy of the position calculation. A lower PDOP value indicates better satellite geometry and results in more accurate position fixes. PDOP is calculated based on the positions of the satellites...

A compact, portable device used to transmit a distress signal via satellite to alert search and rescue services in emergencies at sea. A Personal Locator Beacon (PLB) is an essential piece of safety equipment for mariners, designed to provide a lifeline in situations where traditional communication methods, such as VHF radios or mobile phones, are...

The RYA Personal Watercraft Proficiency course is designed for jet ski operators, covering essential skills for safe and enjoyable use. Participants learn launching, handling at various speeds, and navigation basics. The course emphasizes safety procedures, including emergency stops and recovery techniques. This program is perfect for beginners or experienced riders seeking a certification often required...