Glossary Archive

A gravity-driven wind that flows downhill from elevated terrain, such as glaciers or high coastal cliffs, typically bringing colder, denser air to lower altitudes. A katabatic wind occurs when cold, dense air accumulates over elevated landmasses—such as ice sheets, mountain slopes, or high plateaus—and then flows downward under the influence of gravity. These winds are...

The International Maritime Signal Flag Kilo. Meaning I wish to communicate with you.If appended by a Numeral Pennant:I wish to communicate with you by:1) Morse signalling by hand flags or arms;2) Loud hailer (megaphone);3) Morse signalling lamp;4) Sound signals.

To move a vessel by hauling on a line attached to a small anchor dropped at a distance from the ship. Kedging is a traditional technique used in maritime operations, particularly when a ship needs to be moved in shallow or restricted waters where using sails or engines is impractical or impossible. The process involves...

A small, lightweight anchor used to reposition or manoeuvre a vessel in confined waters or to assist in anchoring when the main anchor is insufficient. A kedge anchor is a specialised type of anchor that is typically smaller and lighter than a ship's primary anchor. It is often used in situations where a vessel needs...

A structural element that sometimes resembles a fin and protrudes below a boat usually along its centre line

The RYA Keelboat Club Racing course prepares sailors to participate confidently in club-level keelboat races. Participants learn race rules, starting techniques, and tactics for maximizing speed. Practical sessions focus on teamwork, boat handling, and responding to changing wind conditions. By the end, sailors will be equipped with the skills and knowledge to compete effectively in...

The RYA Keelboat Day Sailing course teaches participants how to plan and execute safe and enjoyable day trips in keelboats. This course covers navigation, anchoring, and trip preparation, emphasizing safety and decision-making. Practical exercises include mooring, handling tidal streams, and managing changing weather conditions. By the end, sailors will feel confident undertaking independent keelboat day...

The RYA Keelboat Level 1 course is an entry-level program for those new to sailing. Participants learn basic skills such as rigging, steering, and sail handling in a keelboat. The course emphasizes safety, teamwork, and confidence-building, providing a solid foundation for further training. By the end, participants will be ready to progress to Level 2...

The RYA Keelboat Level 2 course builds on Level 1 by teaching participants to sail independently. Practical sessions focus on tacking, gybing, and navigating various wind directions. Participants also practice safety procedures and capsize recovery. By the end, sailors will have the skills to handle keelboats confidently in moderate conditions, setting the stage for more...

The RYA Keelboat Level 3 course refines sailing techniques and enhances confidence in challenging conditions. Participants practice advanced maneuvers, improve sail trimming, and learn about boat balance and navigation. The course emphasizes decision-making and problem-solving on the water. By the end, sailors will have the skills to manage keelboats with precision and prepare for specialized...