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Glossary

• 2 - Two (Too) (25th October 2024)
• 3 - Three (Tree) (25th October 2024)
• 4 - Four (For Er) (25th October 2024)
• 5 - Five (Fife) (25th October 2024)
• 6 - Six (25th October 2024)
• 7 - Seven (Sev-En) (25th October 2024)
• 8 - Eight (Ait) (25th October 2024)
• 9 - Nine (Nin Er) (25th October 2024)
• Abaft (25th October 2024)
• Abate (25th October 2024)
• Abeam (25th October 2024)
• Above board (25th October 2024)
• Above deck (25th October 2024)
• Accidental Gybe (2nd January 2025)
• Adrift (25th October 2024)
• Advanced Pilotage (4th February 2025)
• Advanced Plus Windsurfing (4th February 2025)
• Advanced Windsurfing (4th February 2025)
• Afloat (25th October 2024)
• Aft (25th October 2024)
• After Deck (25th October 2024)
• Aground (25th October 2024)
• Ahead (25th October 2024)
• Ahoy! (25th October 2024)
• Air Cushioned Vessel (25th October 2024)
• Alee (25th October 2024)
• All at sea (25th October 2024)
• All at sea (25th October 2024)
• Aloft (25th October 2024)
• Alongside (25th October 2024)
• Aloof (25th October 2024)
• Alpha (26th October 2024)
• American Sailing Association (24th February 2025)
• Amidships (25th October 2024)
• Anchor (25th October 2024)
• Anchor Aweigh (25th October 2024)
• Anchor Ball (25th October 2024)
• Anchor Buoy (25th October 2024)
• Anchor Cable (25th October 2024)
• Anchor Light (25th October 2024)
• Anchor Locker (25th October 2024)
• Anchor Roller (25th October 2024)
• Anchorage (25th October 2024)
• Angle of Vanishing Stability (25th October 2024)
• ANNEX I: Positioning and Technical Details of Lights and Shapes (21st December 2024)
• ANNEX II: Additional signals for fishing vessel fishing in close proximity (21st December 2024)
• ANNEX III: Technical details of sound signal appliances (21st December 2024)
• ANNEX IV: Distress Signals (21st December 2024)
• Antifoul (25th October 2024)
• Apparent Wind (25th October 2024)
• As the crow flies (25th October 2024)
• Ashore (25th October 2024)
• Astern (25th October 2024)
• At loggerheads (25th October 2024)
• Attention (Flag Semaphore) (18th December 2024)
• Automatic Identification System (25th October 2024)
• Autonomous Underwater Vehicle (25th October 2024)
• Autopilot (25th October 2024)
• Auxiliary (25th October 2024)
• Awash (25th October 2024)
• Baby Stay (25th October 2024)
• Back (25th October 2024)
• Back (25th October 2024)
• Back Stay (25th October 2024)
• Bail (25th October 2024)
• Bailer (25th October 2024)
• Ball (25th October 2024)
• Ballast (25th October 2024)
• Bar (25th October 2024)
• Barber Hauler (5th April 2025)
• Bare Poles (25th October 2024)
• Basic Sea Survival Certificate (4th February 2025)
• Bathing Platform (25th October 2024)
• Batten (25th October 2024)
• Batten Pocket (25th October 2024)
• Beach (25th October 2024)
• Beacon (25th October 2024)
• Beam (25th October 2024)
• Beam Reach (25th October 2024)
• Bear Away (25th October 2024)
• Bearing (25th October 2024)
• Bearing to Waypoint (25th October 2024)
• Beating (25th October 2024)
• Beaufort Scale (25th October 2024)
• Below Deck (25th October 2024)
• Bermuda Rig (11th February 2025)
• Bermudan Rig (25th October 2024)
• Berth (25th October 2024)
• Bi-colour Light (25th October 2024)
• Bight (25th October 2024)
• Bilge Pump (25th October 2024)
• Bilges (25th October 2024)
• Bimini (7th March 2025)
• Binnacle (25th October 2024)
• Block (25th October 2024)
• Boat Hook (25th October 2024)
• Boat Wind (25th October 2024)
• Bollard (25th October 2024)
• Boom (25th October 2024)
• Boom Out (25th October 2024)
• Bosun (25th October 2024)
• Bow (25th October 2024)
• Bow Line (25th October 2024)
• Bow Spring (25th October 2024)
• Bowline (25th October 2024)
• Bowsprit (25th October 2024)
• Bravo (25th October 2024)
• Breakwater (25th October 2024)
• Broach (25th October 2024)
• Broad Reach (25th October 2024)
• Bruce Anchor (28th February 2025)
• Bulkhead (25th October 2024)
• Bung (25th October 2024)
• Bunk (25th October 2024)
• Buoy (25th October 2024)
• Buoyancy Aid (25th October 2024)
• Buoyant Smoke Flare (19th March 2025)
• Burgee (25th October 2024)
• By and Large (26th March 2025)
• Cabin (25th October 2024)
• Cable (25th October 2024)
• Cable (25th October 2024)
• Call Sign (25th October 2024)
• Cam Cleat (7th March 2025)
• Cancel--Disregard (Flag Semaphore) (26th October 2024)
• Capsize (25th October 2024)
• Cardinal Bearing (25th October 2024)
• Cardinal Mark (25th October 2024)
• Cast Off (25th October 2024)
• Catamaran (25th October 2024)
• CEVNI test online (4th February 2025)
• Chafing (25th October 2024)
• Chain Plate (25th October 2024)
• Chainplate (7th March 2025)
• Chandler (25th October 2024)
• Channel (25th October 2024)
• Charlie (25th October 2024)
• Chart (25th October 2024)
• Chart Datum (25th October 2024)
• Chart Plotter (25th October 2024)
• Chart Table (25th October 2024)
• Charted Depth (25th October 2024)
• Chief Mate (14th November 2024)
• Chine (25th October 2024)
• Chock-a-block (25th October 2024)
• Chop (25th October 2024)
• Chronometer (25th October 2024)
• Clean Bill of Health (26th March 2025)
• Clear (25th October 2024)
• Clear (25th October 2024)
• Clear (25th October 2024)
• Clearance (25th October 2024)
• Cleat (25th October 2024)
• Clew (25th October 2024)
• Clew Outhaul (25th October 2024)
• Close Hauled (25th October 2024)
• Closest Point of Approach (25th October 2024)
• Clove Hitch (25th October 2024)
• Clutch (7th March 2025)
• Coachroof (25th October 2024)
• Coaming (25th October 2024)
• Coastal Skipper Practical (Motor) (4th February 2025)
• Coastal Skipper Practical (Sail) (4th February 2025)
• Coastal Skipper/Yachtmaster Offshore Theory (4th February 2025)
• Coastguard (25th October 2024)
• Cocked Hat (25th October 2024)
• Cockpit (25th October 2024)
• Code Flag Alpha (A) (25th October 2024)
• Code Flag Bravo (B) (2nd January 2025)
• Code Flag Charlie (C) (2nd January 2025)
• Code Flag Delta (D) (2nd January 2025)
• Code Flag Echo (E) (2nd January 2025)
• Code Flag Foxtrot (F) (2nd January 2025)
• Code Flag Golf (G) (2nd January 2025)
• Code Flag Hotel (H) (2nd January 2025)
• Code Flag India (I) (2nd January 2025)
• Code Flag Juliett (J) (2nd January 2025)
• Code Flag Kilo (K) (2nd January 2025)
• Code Flag Lima (L) (2nd January 2025)
• Code Flag Mike (M) (2nd January 2025)
• Code Flag November (N) (2nd January 2025)
• Code Flag Oscar (O) (2nd January 2025)
• Code Flag Papa (P) (2nd January 2025)
• Code Flag Quebec (Q) (2nd January 2025)
• Code Flag Romeo (R) (2nd January 2025)
• Code Flag Sierra (S) (2nd January 2025)
• Code Flag Tango (T) (2nd January 2025)
• Code Flag Uniform (U) (2nd January 2025)
• Code Flag Victor (V) (2nd January 2025)
• Code Flag Whiskey (W) (2nd January 2025)
• Code Flag Xray (X) (2nd January 2025)
• Code Flag Yankee (Y) (3rd January 2025)
• Code Flag Zulu (Z) (3rd January 2025)
• Code Zero (7th March 2025)
• Collision Course (25th October 2024)
• Commissioners of Irish Lights (4th November 2024)
• Companionway (25th October 2024)
• Companionway Steps (25th October 2024)
• Compass (25th October 2024)
• Compass Add East for True (4th November 2024)
• Compass Rose (25th October 2024)
• Competent Crew (4th February 2025)
• Constant Bearing, Decreasing Range (25th October 2024)
• Constrained by Draught (25th October 2024)
• Contour Line (25th October 2024)
• Coordinated Universal Time (3rd February 2025)
• Cospas-Sarsat System (19th March 2025)
• Course Over Ground (25th October 2024)
• Course to Steer (25th October 2024)
• Courtesy Ensign (25th October 2024)
• Courtesy Flag (25th October 2024)
• CQR Anchor (25th October 2024)
• Crew (25th October 2024)
• Cringle (25th October 2024)
• Cross Track Error (25th October 2024)
• Cruising Level 1 - Start Sailing (4th February 2025)
• Cruising Level 2 - Basic Skills (4th February 2025)
• Current (25th October 2024)
• Cutlass (25th October 2024)
• Cutlass Bearing (25th October 2024)
• Cyclone (25th October 2024)
• Cyclonic (25th October 2024)
• Danbuoy (25th October 2024)
• Danforth Anchor (28th February 2025)
• Davit (25th October 2024)
• Davits (7th March 2025)
• Day Shape (25th October 2024)
• Day Skipper Practical (Motor) (4th February 2025)
• Day Skipper Practical (Sail) (4th February 2025)
• Day Skipper Theory (4th February 2025)
• Dead Reckoning (25th October 2024)
• Deck Log (25th October 2024)
• Deck Officer (14th November 2024)
• Delta (25th October 2024)
• Delta (1st January 2025)
• Delta Anchor (1st January 2025)
• Depression (25th October 2024)
• Depth (25th October 2024)
• Deviation (25th October 2024)
• Deviation card (25th October 2024)
• Diaphone (25th October 2024)
• Diesel Engine (4th February 2025)
• Digital Selective Calling (25th October 2024)
• Digital Selective Calling (8th February 2025)
• Dilution of Precision (25th October 2024)
• Dinghy (25th October 2024)
• Dinghy Club Racing (4th February 2025)
• Dinghy Day Sailing (4th February 2025)
• Dinghy Foiling First Flights (4th February 2025)
• Dinghy Foiling Performance Flights (4th February 2025)
• Dinghy Foiling Sustained Flights (4th February 2025)
• Dinghy Level 1 - Start Sailing (4th February 2025)
• Dinghy Level 2 - Basic Skills (4th February 2025)
• Dinghy Level 3 - Better Sailing (4th February 2025)
• Dinghy Performance Sailing (4th February 2025)
• Dinghy Regional Racing (4th February 2025)
• Dinghy Sailing with Spinnakers (4th February 2025)
• Dinghy Seamanship Skills (4th February 2025)
• Dinghy Start Racing (4th February 2025)
• Dip the Ensign (25th October 2024)
• Direction of Buoyage (25th October 2024)
• Directional Light (25th October 2024)
• Displacement (25th October 2024)
• Displacement Vessel (25th October 2024)
• Distance (25th October 2024)
• Distance to Waypoint (25th October 2024)
• Dividers (25th October 2024)
• Dodger (25th October 2024)
• Dog Watch (27th March 2025)
• Dolphin (25th October 2024)
• Double Up (25th October 2024)
• Douse (25th October 2024)
• Downhaul (25th October 2024)
• Downstream (25th October 2024)
• Downwind (25th October 2024)
• Drag (25th October 2024)
• Draught (25th October 2024)
• Dredger (25th October 2024)
• Drift (25th October 2024)
• Drogue (25th October 2024)
• Drying Height (25th October 2024)
• Dyneema (25th October 2024)
• Ease Out (25th October 2024)
• Ebb Tide (25th October 2024)
• Echo (25th October 2024)
• Echo Sounder (25th October 2024)
• Echo Sounding (25th October 2024)
• Electronic Chart Display and Information System (25th October 2024)
• Electronic Navigation Chart (25th October 2024)
• Emergency Position Indicating Radio Beacon (25th October 2024)
• Ensign (25th October 2024)
• Error (Flag Semaphore) (26th October 2024)
• Error (Flag Semaphore) (26th October 2024)
• Essential Navigation and Seamanship (4th February 2025)
• Estimated Position (25th October 2024)
• Estimated Time of Arrival (25th October 2024)
• Even Keel (25th October 2024)
• Eye Splice (25th October 2024)
• Fair (25th October 2024)
• Fairlead (25th October 2024)
• Fairway (25th October 2024)
• Fairway Mark (25th October 2024)
• Fathom (25th October 2024)
• Feeling Blue (25th October 2024)
• Fender (25th October 2024)
• Fetch (25th October 2024)
• Fid (25th October 2024)
• Figure of Eight (8th January 2025)
• First Aid (4th February 2025)
• First Substitute (ICS Flag) (28th December 2024)
• Fix (25th October 2024)
• Flag Semaphore Signals (26th October 2024)
• Flake (25th October 2024)
• Flaking a Line (25th October 2024)
• Flaking a Sail (25th October 2024)
• Flares (25th October 2024)
• Flashing Light (25th October 2024)
• Flood Tide (25th October 2024)
• Fluke (25th October 2024)
• Flying Out (25th October 2024)
• Fo'c'sle (25th October 2024)
• Fog (25th October 2024)
• Foghorn (25th October 2024)
• Folding Propeller (25th October 2024)
• Following Sea (25th October 2024)
• Foot (25th October 2024)
• Fore Triangle (25th October 2024)
• Fore-and-aft (25th October 2024)
• Foredeck (25th October 2024)
• Forehatch (25th October 2024)
• Forepeak (25th October 2024)
• Foresail (25th October 2024)
• Forestay (25th October 2024)
• Forward (25th October 2024)
• Foul (25th October 2024)
• Foul Anchor (25th October 2024)
• Foxtrot (25th October 2024)
• Freeboard (25th October 2024)
• Fuel collar (25th October 2024)
• Full Rudder (25th October 2024)
• Furl (25th October 2024)
• Furling (25th October 2024)
• Furling Drum (7th March 2025)
• Gaff (25th October 2024)
• Gaff Rig (25th October 2024)
• Gale (25th October 2024)
• Galley (25th October 2024)
• Gelcoat (25th October 2024)
• General Lighthouse Authorities (4th November 2024)
• Genoa (25th October 2024)
• Geometric Dilution of Precision (25th October 2024)
• Give Way (25th October 2024)
• Give Way Vessel (25th October 2024)
• Glass Reinforced Plastic (25th October 2024)
• Global Maritime Distress and Safety System (25th October 2024)
• Global Navigation Satellite System (25th October 2024)
• Global Positioning System (25th October 2024)
• Gnomonic Projection (25th October 2024)
• Go About (25th October 2024)
• Going Astern (25th October 2024)
• Golf (25th October 2024)
• Goose Winging (25th October 2024)
• Goose-winged (25th October 2024)
• Gooseneck (25th October 2024)
• Goosewinged (25th October 2024)
• Grab Rail (25th October 2024)
• Greenwich Mean Time (3rd February 2025)
• Ground (25th October 2024)
• Guard Rail (25th October 2024)
• Guardrail (25th October 2024)
• Gunwale (25th October 2024)
• Guy (25th October 2024)
• Gybe (25th October 2024)
• Gybe-oh! (25th October 2024)
• Halyard (25th October 2024)
• Hand Bearing Compass (25th October 2024)
• Hand-held Flare (19th March 2025)
• Handrail (25th October 2024)
• Handy Billy (25th October 2024)
• Hank (25th October 2024)
• Harbour (25th October 2024)
• Harden In (25th October 2024)
• Harden Up (25th October 2024)
• Hatch (25th October 2024)
• Haul In (25th October 2024)
• Head (25th October 2024)
• Head (25th October 2024)
• Head to Wind (25th October 2024)
• Heading (25th October 2024)
• Headland (25th October 2024)
• Headsail (25th October 2024)
• Headway (25th October 2024)
• Heave To (25th October 2024)
• Heel (25th October 2024)
• Height of Light (25th October 2024)
• Height of Tide (25th October 2024)
• Helm (25th October 2024)
• Helmsman (25th October 2024)
• Helmsman's Practical (4th February 2025)
• High Frequency (8th February 2025)
• Highest Astronomical Tide (25th October 2024)
• His Majesty's Nautical Almanac Office (11th February 2025)
• Hitch (25th October 2024)
• Hoist (25th October 2024)
• Holding Tank (25th October 2024)
• Horizontal Dilution of Precision (25th October 2024)
• Horseshoe Lifebuoy (25th October 2024)
• Hotel (25th October 2024)
• Hounds (25th October 2024)
• House flag (25th October 2024)
• Hull (25th October 2024)
• Hull Speed (25th October 2024)
• Hurricane Force (25th October 2024)
• Hydrofoil (25th October 2024)
• Hydrography (25th October 2024)
• Impeller (25th October 2024)
• Improve your Wingsurfing (4th February 2025)
• In Hauler (5th April 2025)
• In Irons (25th October 2024)
• In Stays (25th October 2024)
• India (25th October 2024)
• Inland Waterways Crew (4th February 2025)
• Inland Waterways Helmsman's (4th February 2025)
• INMARSAT (19th March 2025)
• Inshore (25th October 2024)
• Intermediate Windsurfing (4th February 2025)
• Intermediate Windsurfing (Planing) (4th February 2025)
• International Association of Lighthouse Authorities (25th October 2024)
• International Certificate of Competence (24th February 2025)
• International Code of Signals (25th October 2024)
• International Convention for the Prevention of Pollution from Ships (25th October 2024)
• International Convention on Standards of Training, Certification, and Watchkeeping for Seafarers (14th November 2024)
• International Date Line (3rd February 2025)
• International Hydrographic Organization (10th January 2025)
• International Maritime Conventions (14th November 2024)
• International Maritime Organisation (25th October 2024)
• International Maritime Signal Flags (28th December 2024)
• International Meridian Conference (3rd February 2025)
• International Morse Code (24th December 2024)
• International Radiotelegraph Conference (15th November 2024)
• International Regulations for Preventing Collisions at Sea (25th October 2024)
• International Telecommunication Union (15th November 2024)
• Isobar (25th October 2024)
• Isolated Danger Mark (25th October 2024)
• Isophase (25th October 2024)
• Jackstay (25th October 2024)
• Jib (25th October 2024)
• Jib Sheets (25th October 2024)
• Jonbuoy (19th March 2025)
• Juliett (25th October 2024)
• Jury Rig (25th October 2024)
• Kedge (25th October 2024)
• Kedge Anchor (25th October 2024)
• Keel (25th October 2024)
• Keelboat Club Racing (4th February 2025)
• Keelboat Day Sailing (4th February 2025)
• Keelboat Level 1 - Start Sailing (4th February 2025)
• Keelboat Level 2 - Basic Skills (4th February 2025)
• Keelboat Level 3 - Better Sailing (4th February 2025)
• Keelboat Performance Sailing (4th February 2025)
• Keelboat Regional Racing (4th February 2025)
• Keelboat Sailing with Spinnakers (4th February 2025)
• Keelboat Seamanship Skills (4th February 2025)
• Keelboat Start Racing (4th February 2025)
• Ketch (25th October 2024)
• Kicking Strap (25th October 2024)
• Kilo (25th October 2024)
• Knot (14th November 2024)
• Knot (25th October 2024)
• Landfall (25th October 2024)
• Lanyard (25th October 2024)
• Lash Down (25th October 2024)
• Lateral Mark (25th October 2024)
• Latitude (25th October 2024)
• Lazarette (25th October 2024)
• Lazy Jacks (25th October 2024)
• Leading Lights (25th October 2024)
• Leadline (25th October 2024)
• League (25th October 2024)
• Learn to Wingsurf (4th February 2025)
• Lee (25th October 2024)
• Lee-oh! (25th October 2024)
• Leech (25th October 2024)
• Leeshore (25th October 2024)
• Leeward (25th October 2024)
• Leeway (25th October 2024)
• Leg (25th October 2024)
• Length Overall (25th October 2024)
• Letter A (Flag Semaphore) (26th October 2024)
• Letter A (Morse Code) (24th December 2024)
• Letter B (Flag Semaphore) (26th October 2024)
• Letter B (Morse Code) (25th December 2024)
• Letter C (Flag Semaphore) (1st November 2024)
• Letter C (Morse Code) (25th December 2024)
• Letter D (Flag Semaphore) (26th October 2024)
• Letter D (Morse Code) (25th December 2024)
• Letter E (Flag Semaphore) (26th October 2024)
• Letter E (Morse Code) (25th December 2024)
• Letter F (Flag Semaphore) (26th October 2024)
• Letter F (Morse Code) (25th December 2024)
• Letter G (Flag Semaphore) (26th October 2024)
• Letter G (Morse Code) (25th December 2024)
• Letter H (Flag Semaphore) (26th October 2024)
• Letter H (Morse Code) (25th December 2024)
• Letter I (Flag Semaphore) (26th October 2024)
• Letter I (Morse Code) (25th December 2024)
• Letter J (Flag Semaphore) (26th October 2024)
• Letter J (Morse Code) (25th December 2024)
• Letter K (Flag Semaphore) (26th October 2024)
• Letter K (Morse Code) (25th December 2024)
• Letter L (Flag Semaphore) (26th October 2024)
• Letter L (Morse Code) (25th December 2024)
• Letter M (Flag Semaphore) (26th October 2024)
• Letter M (Morse Code) (25th December 2024)
• Letter N (Flag Semaphore) (26th October 2024)
• Letter N (Morse Code) (25th December 2024)
• Letter O (Flag Semaphore) (26th October 2024)
• Letter O (Morse Code) (25th December 2024)
• Letter P (Flag Semaphore) (26th October 2024)
• Letter P (Morse Code) (25th December 2024)
• Letter Q (Flag Semaphore) (26th October 2024)
• Letter Q (Morse Code) (25th December 2024)
• Letter R (Flag Semaphore) (26th October 2024)
• Letter R (Morse Code) (25th December 2024)
• Letter S (Flag Semaphore) (26th October 2024)
• Letter S (Morse Code) (25th December 2024)
• Letter T (Flag Semaphore) (26th October 2024)
• Letter T (Morse Code) (25th December 2024)
• Letter U (Flag Semaphore) (26th October 2024)
• Letter U (Morse Code) (25th December 2024)
• Letter V (Flag Semaphore) (26th October 2024)
• Letter V (Morse Code) (25th December 2024)
• Letter W (Flag Semaphore) (26th October 2024)
• Letter W (Morse Code) (25th December 2024)
• Letter X (Flag Semaphore) (26th October 2024)
• Letter X (Morse Code) (25th December 2024)
• Letter Y (Flag Semaphore) (26th October 2024)
• Letter Y (Morse Code) (25th December 2024)
• Letter Z (Flag Semaphore) (26th October 2024)
• Letter Z (Morse Code) (25th December 2024)
• Letters to Follow (Flag Semaphore) (27th October 2024)
• Level 1 Start Powerboating (PB1) (4th February 2025)
• Level 2 Powerboat Handling (PB2) (4th February 2025)
• Life Jacket (19th March 2025)
• Lifeline (25th October 2024)
• Liferaft (25th October 2024)
• Lighthouse (25th October 2024)
• Lima (25th October 2024)
• Line (25th October 2024)
• Lines of Position (20th March 2025)
• List (25th October 2024)
• Listing (19th February 2025)
• Local Notice to Mariners (25th October 2024)
• Lock (25th October 2024)
• Locker (25th October 2024)
• Log (25th October 2024)
• Log Line (14th November 2024)
• Log Reading (25th October 2024)
• Logbook (25th October 2024)
• Longitude (25th October 2024)
• Look-out (25th October 2024)
• Lose Way (25th October 2024)
• Lowest Astronomical Tide (25th October 2024)
• Lubber Line (25th October 2024)
• Luff (25th October 2024)
• Luff Up (25th October 2024)
• Lull (25th October 2024)
• Magnetic North (25th October 2024)
• Mail Sail (25th October 2024)
• Mainsail (25th October 2024)
• Mainsheet Traveller (25th October 2024)
• Make Fast (25th October 2024)
• Making Way (25th October 2024)
• Man Overboard (26th March 2025)
• Marina (25th October 2024)
• Marine Accident and Investigation Branch (4th November 2024)
• Marine Radio VHF (SRC) (4th February 2025)
• Maritime and Coastguard Agency (25th October 2024)
• Maritime Mobile Service Identity (25th October 2024)
• Maritime Rescue Coordination Centre (15th January 2025)
• Maritime Safety Information (25th October 2024)
• Mark (25th October 2024)
• Mast (25th October 2024)
• Mast Step (25th October 2024)
• Masthead light (25th October 2024)
• MayDay (25th October 2024)
• Mean High Water Neaps (25th October 2024)
• Mean High Water Springs (25th October 2024)
• Mean Low Water Neaps (25th October 2024)
• Mean Low Water Springs (25th October 2024)
• Medium Frequency (15th January 2025)
• Mike (25th October 2024)
• Mist (25th October 2024)
• Mizzen Mast (25th October 2024)
• Mole (25th October 2024)
• Monohull (25th October 2024)
• Mooring (25th October 2024)
• Mooring (25th October 2024)
• Mooring Buoy (25th October 2024)
• Mooring Ring (25th October 2024)
• Motor sailing (25th October 2024)
• Multihull Club Racing (4th February 2025)
• Multihull Day Sailing (4th February 2025)
• Multihull Level 1 - Start Sailing (4th February 2025)
• Multihull Level 2 - Basic Skills (4th February 2025)
• Multihull Level 3 - Better Sailing (4th February 2025)
• Multihull Performance Sailing (4th February 2025)
• Multihull Regional Racing (4th February 2025)
• Multihull Sailing With Spinnakers (4th February 2025)
• Multihull Seamanship Skills (4th February 2025)
• Multihull Start Racing (4th February 2025)
• National Oceanic and Atmospheric Administration (25th October 2024)
• Nautical Almanac (25th October 2024)
• Nautical Mile (25th October 2024)
• Navigation Lights (25th October 2024)
• Navigational Telex (25th October 2024)
• Neap Range (25th October 2024)
• Neap Tide (25th October 2024)
• Near Gale (25th October 2024)
• Non-Directional Beacon (15th January 2025)
• North Atlantic Treaty Organization (25th October 2024)
• Northern Lighthouse Board (4th November 2024)
• Not Under Command (25th October 2024)
• Notice to Mariners (25th October 2024)
• November (25th October 2024)
• Number 0 (Flag Semaphore) (1st November 2024)
• Number 0 (Morse Code) (25th December 2024)
• Number 1 (Flag Semaphore) (1st November 2024)
• Number 1 (Morse Code) (25th December 2024)
• Number 2 (Flag Semaphore) (27th October 2024)
• Number 2 (Morse Code) (25th December 2024)
• Number 3 (Flag Semaphore) (26th October 2024)
• Number 3 (Morse Code) (25th December 2024)
• Number 4 (Flag Semaphore) (1st November 2024)
• Number 4 (Morse Code) (25th December 2024)
• Number 5 (Flag Semaphore) (1st November 2024)
• Number 5 (Morse Code) (25th December 2024)
• Number 6 (Flag Semaphore) (1st November 2024)
• Number 6 (Morse Code) (25th December 2024)
• Number 7 (Flag Semaphore) (1st November 2024)
• Number 7 (Morse Code) (25th December 2024)
• Number 8 (Flag Semaphore) (1st November 2024)
• Number 8 (Morse Code) (25th December 2024)
• Number 9 (Flag Semaphore) (1st November 2024)
• Number 9 (Morse Code) (25th December 2024)
• Numeral 0 (Flag Pennant) (25th October 2024)
• Numeral 1 (Flag Pennant) (25th October 2024)
• Numeral 2 (Flag Pennant) (27th December 2024)
• Numeral 3 (Flag Pennant) (27th December 2024)
• Numeral 4 (Flag Pennant) (28th December 2024)
• Numeral 5 (Flag Pennant) (28th December 2024)
• Numeral 6 (Flag Pennant) (28th December 2024)
• Numeral 7 (Flag Pennant) (28th December 2024)
• Numeral 8 (Flag Pennant) (28th December 2024)
• Numeral 9 (Flag Pennant) (28th December 2024)
• Numeral Pennant (2nd January 2025)
• Numerals-Numbers Follow (Flag Semaphore) (26th October 2024)
• Occulting (25th October 2024)
• Ocean Data Acquisition System (25th October 2024)
• Officer of the Watch (27th March 2025)
• Offshore (25th October 2024)
• Offshore Personal Survival (RYA/World Sailing) (4th February 2025)
• Oilskins (25th October 2024)
• On the Port Bow (25th October 2024)
• On the Port Quarter (25th October 2024)
• On the Starboard Bow (25th October 2024)
• On the Starboard Quarter (25th October 2024)
• Onshore (25th October 2024)
• Oscar (25th October 2024)
• Outhaul (25th October 2024)
• Overfalls (25th October 2024)
• Overhand loop (25th October 2024)
• Painter (25th October 2024)
• Pan Pan (25th October 2024)
• Papa (25th October 2024)
• Parachute Flare (19th March 2025)
• Parallel Rules (25th October 2024)
• Passage (25th October 2024)
• Passage Plan (20th March 2025)
• Pay Off (25th October 2024)
• Pay Out (25th October 2024)
• Personal Locator Beacon (25th October 2024)
• Personal Watercraft Proficiency (4th February 2025)
• Phonetic Alphabet (25th October 2024)
• Pile (25th October 2024)
• Pilot (25th October 2024)
• Pilotage (25th October 2024)
• Pinch (25th October 2024)
• Pipe down (25th October 2024)
• Pitch (25th October 2024)
• Plot (25th October 2024)
• Pontoon (25th October 2024)
• Pooped (25th October 2024)
• Port (26th March 2025)
• Port (25th October 2024)
• Port Beam (25th October 2024)
• Port Bow (25th October 2024)
• Port of Registry (25th October 2024)
• Port Quarter (25th October 2024)
• Port Tack (25th October 2024)
• Porthole (25th October 2024)
• Portland Plotter (25th October 2024)
• Position Dilution of Precision (25th October 2024)
• Powerboat Advanced (4th February 2025)
• Powerboat Intermediate (4th February 2025)
• Pratique (2nd January 2025)
• Precipitation (25th October 2024)
• Press Gangs (25th October 2024)
• Pressed into service (25th October 2024)
• Prevailing Wind (25th October 2024)
• Preventer (25th October 2024)
• Prime Meridian (14th November 2024)
• Professional Practices and Responsibilities (4th February 2025)
• Propeller (25th October 2024)
• Propeller Shaft (25th October 2024)
• Propeller Walk (25th October 2024)
• Propeller Wash (19th February 2025)
• Pulpit (25th October 2024)
• Pushpit (25th October 2024)
• Pyrotechnic (25th October 2024)
• Q Flag (25th October 2024)
• Quarter Berth (25th October 2024)
• Quebec (25th October 2024)
• Race (25th October 2024)
• Racing Rules of Sailing (25th October 2024)
• Radar (25th October 2024)
• Radar Reflector (25th October 2024)
• Radio Medical Advice Link Call (15th January 2025)
• Raft (25th October 2024)
• Range of Tide (25th October 2024)
• Raster chart (25th October 2024)
• Rate (Tidal Stream) (25th October 2024)
• Reach (25th October 2024)
• Reaching (25th October 2024)
• Ready (Flag Semaphore) (26th October 2024)
• Ready About (25th October 2024)
• Ready to Recieve (Flag Semaphore) (18th December 2024)
• Reef (25th October 2024)
• Reefing (25th October 2024)
• Reefing Hook (25th October 2024)
• Reefing Lines (25th October 2024)
• Rest (Flag Semaphore) (1st November 2024)
• Restricted in Ability to Manoeuvre (25th October 2024)
• Restricted Visibility (25th October 2024)
• Rhumb Line (25th October 2024)
• Riding Turn (25th October 2024)
• Rigging (25th October 2024)
• Rigging (25th October 2024)
• Rigid Inflatable Boat (25th October 2024)
• Risk of Collision (25th October 2024)
• Rode (25th October 2024)
• Roller Furling (25th October 2024)
• Roller Reef (25th October 2024)
• Romeo (25th October 2024)
• Round Up (25th October 2024)
• Roving Fender (25th October 2024)
• Royal National Lifeboat Institution (25th October 2024)
• Royal Yachting Association (24th February 2025)
• Rudder (25th October 2024)
• Rudder Stock (25th October 2024)
• Rule 1: Application (25th October 2024)
• Rule 10: Traffic Separation Schemes (25th October 2024)
• Rule 11: Application (25th October 2024)
• Rule 12: Sailing vessels (25th October 2024)
• Rule 13: Overtaking (25th October 2024)
• Rule 14: Head-on situation (25th October 2024)
• Rule 15: Crossing situation (25th October 2024)
• Rule 16: Action by give-way vessel (25th October 2024)
• Rule 17: Action by stand-on vessel (25th October 2024)
• Rule 18: Responsibilities between vessels (25th October 2024)
• Rule 19: Conduct of vessels in restricted visibility (25th October 2024)
• Rule 2: Responsibility (25th October 2024)
• Rule 20: Application (25th October 2024)
• Rule 21: Definitions (25th October 2024)
• Rule 22: Visibility of lights (25th October 2024)
• Rule 23: Power-driven vessels underway (25th October 2024)
• Rule 24: Towing and pushing (25th October 2024)
• Rule 25: Sailing vessels underway and vessels under oars (25th October 2024)
• Rule 26: Fishing vessels (25th October 2024)
• Rule 27: Vessel not under command or restricted in their ability to manoeuvre (25th October 2024)
• Rule 28: Vessel constrained by their draught (25th October 2024)
• Rule 29: Pilot vessels (25th October 2024)
• Rule 3: General definitions (25th October 2024)
• Rule 30: Anchored vessels and vessels aground (25th October 2024)
• Rule 31: Seaplanes (25th October 2024)
• Rule 32: Definitions (25th October 2024)
• Rule 33: Equipment for sound signals (25th October 2024)
• Rule 34: Manoeuvring and warning signals (25th October 2024)
• Rule 35: Sound signals in restricted visibility (25th October 2024)
• Rule 36: Sound signals to attract attention (25th October 2024)
• Rule 37: Distress signals (25th October 2024)
• Rule 38: Exemptions (25th October 2024)
• Rule 39: Definitions (25th October 2024)
• Rule 4: Application (25th October 2024)
• Rule 40: Application (25th October 2024)
• Rule 41: Verification of Compliance (25th October 2024)
• Rule 5: Look-out (25th October 2024)
• Rule 6: Safe speed (25th October 2024)
• Rule 7: Risk of collision (25th October 2024)
• Rule 8: Action to avoid collision (25th October 2024)
• Rule 9: Narrow channels (25th October 2024)
• Run (25th October 2024)
• Running (26th March 2025)
• Running Backstay (9th November 2024)
• Running Fix (25th October 2024)
• Running Rigging (25th October 2024)
• RYA DofE Centre (4th February 2025)
• RYA Training Almanac (25th October 2024)
• RYA Training Chart (25th October 2024)
• RYA/MCA Advanced Powerboat Exam (4th February 2025)
• RYA/MCA Yachtmaster Coastal Motor Exam (4th February 2025)
• RYA/MCA Yachtmaster Coastal Sail Exam (4th February 2025)
• RYA/MCA Yachtmaster Ocean Exam (4th February 2025)
• RYA/MCA Yachtmaster Offshore Motor Exam (4th February 2025)
• RYA/MCA Yachtmaster Offshore Sail Exam (4th February 2025)
• S-100 Universal Hydrographic Data Model (10th January 2025)
• Sacrificial Anode (25th October 2024)
• Safe and Fun Safeguarding (4th February 2025)
• Safe Water Mark (25th October 2024)
• Safety Boat (4th February 2025)
• Safety of Life at Sea (25th October 2024)
• Saffir–Simpson Hurricane Wind Scale (25th October 2024)
• Sail Drive (25th October 2024)
• Sail Locker (25th October 2024)
• Sail Ties (25th October 2024)
• Saildrive (25th October 2024)
• Sailing Directions (25th October 2024)
• Salinity (25th October 2024)
• Saloon (25th October 2024)
• Scope (25th October 2024)
• Scupper (25th October 2024)
• Sea Anchor (25th October 2024)
• Sea Breeze (25th October 2024)
• Seacock (25th October 2024)
• Sealegs (25th October 2024)
• Search and Rescue (25th October 2024)
• Search and Rescue Transponder (19th February 2025)
• Second Substitute (ICS Flag) (28th December 2024)
• Secondary Port (25th October 2024)
• Sector Light (25th October 2024)
• Sécurité (25th October 2024)
• Semaphore (1st November 2024)
• Semi-Displacement Vessel (25th October 2024)
• Send (25th October 2024)
• Set (25th October 2024)
• Set (25th October 2024)
• Set Sail (25th October 2024)
• Shackle (25th October 2024)
• Shaft Drive (25th October 2024)
• Shaftdrive (25th October 2024)
• Sheet (25th October 2024)
• Shipping Forecast (25th October 2024)
• Shipping Lane (25th October 2024)
• Shipshape (25th October 2024)
• Shoal (25th October 2024)
• Shock Cord (25th October 2024)
• Shorten Sail (25th October 2024)
• Shroud (25th October 2024)
• Side Deck (25th October 2024)
• Sierra (25th October 2024)
• Sill (25th October 2024)
• Skeg (25th October 2024)
• Slab Reef (25th October 2024)
• Slack Off (25th October 2024)
• Slack Water (25th October 2024)
• Slam (25th October 2024)
• Slide (25th October 2024)
• Slip (25th October 2024)
• Slipway (25th October 2024)
• Sloop (25th October 2024)
• Slot (25th October 2024)
• Small Vessel Electronic Chart Systems (14th January 2025)
• Snatch (25th October 2024)
• Snug Down (25th October 2024)
• SOLAS V (25th October 2024)
• Sole (25th October 2024)
• Sole boards (25th October 2024)
• SOS (25th October 2024)
• Sou’wester (25th October 2024)
• Sound (25th October 2024)
• Sounding (25th October 2024)
• Space (Flag Semaphore) (1st November 2024)
• Spar (25th October 2024)
• Speed Made Good (25th October 2024)
• Speed Over Ground (25th October 2024)
• Spill Wind (25th October 2024)
• Spinnaker (25th October 2024)
• Spinnaker Pole (25th October 2024)
• Spit (25th October 2024)
• Splice (25th October 2024)
• Sportbootführerschein (24th February 2025)
• Sportbootführerschein Binnen (24th February 2025)
• Sportbootführerschein See (24th February 2025)
• Sportküstenschifferschein (24th February 2025)
• Sports Boat (25th October 2024)
• Spray Hood (25th October 2024)
• Spreaders (25th October 2024)
• Spring Range (25th October 2024)
• Spring Tide (25th October 2024)
• Springs (25th October 2024)
• Squall (25th October 2024)
• Stanchion (25th October 2024)
• Stand by to Gybe (25th October 2024)
• Stand Off (25th October 2024)
• Stand On (25th October 2024)
• Standard Port (25th October 2024)
• Standing End (25th October 2024)
• Standing part (25th October 2024)
• Standing Rigging (25th October 2024)
• Starboard (25th October 2024)
• Starboard Beam (25th October 2024)
• Starboard Bow (25th October 2024)
• Starboard Quarter (25th October 2024)
• Starboard Tack (25th October 2024)
• Start Motor Cruising (4th February 2025)
• Start Windsurfing (4th February 2025)
• Start Yachting (4th February 2025)
• Statute Mile (14th November 2024)
• Stay (25th October 2024)
• Steady (25th October 2024)
• Steaming (25th October 2024)
• Steering Compass (25th October 2024)
• Stem (25th October 2024)
• Stern (25th October 2024)
• Stern Drive (25th October 2024)
• Stern Light (25th October 2024)
• Stern Line (25th October 2024)
• Stern Spring (11th February 2025)
• Stopper Knot (25th October 2024)
• Storm (25th October 2024)
• Storm Jib (25th October 2024)
• Stove (25th October 2024)
• Stow (25th October 2024)
• Superbuoy (25th October 2024)
• Swashway (25th October 2024)
• Swinging Room (25th October 2024)
• Synoptic Chart (25th October 2024)
• Tack (26th March 2025)
• Tack (25th October 2024)
• Tacking (25th October 2024)
• Take In (25th October 2024)
• Take the Helm (25th October 2024)
• Tango (25th October 2024)
• Tell Tales (25th October 2024)
• Tender (25th October 2024)
• Tender Operator (4th February 2025)
• The Bitter End (25th October 2024)
• The Challenger of Record (25th October 2024)
• The Royal Institution of Naval Architects (4th November 2024)
• Third Substitute (ICS Flag) (28th December 2024)
• Three sheets to the wind (26th March 2025)
• Tidal Stream (25th October 2024)
• Tidal Stream Atlas (25th October 2024)
• Tide (25th October 2024)
• Tide Tables (25th October 2024)
• Tiller (25th October 2024)
• Time Dilution of Precision (25th October 2024)
• Time to Closest Point of Approach (25th October 2024)
• Time to Go (25th October 2024)
• Time Zone (25th October 2024)
• Toe Rail (25th October 2024)
• Tomasz Schafernaker (25th October 2024)
• Topping Lift (25th October 2024)
• Topsides (25th October 2024)
• Traffic Separation Scheme (25th October 2024)
• Transit (25th October 2024)
• Transom (25th October 2024)
• Traveller (25th October 2024)
• Tri-colour Light (25th October 2024)
• Trim (25th October 2024)
• Trim Tabs (25th October 2024)
• Trimaran (25th October 2024)
• Trinity House (4th November 2024)
• Tropical Hurricane (25th October 2024)
• True North (25th October 2024)
• True Wind (25th October 2024)
• Turn (25th October 2024)
• U.S. Coast Guard (14th November 2024)
• UK Hydrographic Office (11th February 2025)
• Ultraviolet (25th October 2024)
• Under the Weather (25th October 2024)
• Underhand loop (25th October 2024)
• Underway (25th October 2024)
• Uniform (25th October 2024)
• United Nations (15th November 2024)
• United States Naval Observatory (11th February 2025)
• Unlucky Bananas (25th October 2024)
• Vang (25th October 2024)
• Vanishing Angle (25th October 2024)
• Variation (25th October 2024)
• Vector Chart (25th October 2024)
• Velocity Made Good (25th October 2024)
• Vertical Dilution of Precision (25th October 2024)
• Very High Frequency (25th October 2024)
• Vessel (25th October 2024)
• Vessel Traffic Service (24th February 2025)
• VHF Radio (19th March 2025)
• Victor (25th October 2024)
• Victualling (25th October 2024)
• Violent Storm (25th October 2024)
• Wake (25th October 2024)
• Warp (25th October 2024)
• Warps (25th October 2024)
• Wash (25th October 2024)
• Wash Boards (25th October 2024)
• Watch (25th October 2024)
• Water Track (25th October 2024)
• Waterline length (25th October 2024)
• Way (25th October 2024)
• Waypoint (25th October 2024)
• Weather Helm (25th October 2024)
• Weigh Anchor (25th October 2024)
• Wheel (25th October 2024)
• Whipping (25th October 2024)
• Whisker (25th October 2024)
• Whiskey (25th October 2024)
• White Horses (25th October 2024)
• Whole Gale (25th October 2024)
• Winch (25th October 2024)
• Winch Handle (25th October 2024)
• Windage (25th October 2024)
• Windlass (25th October 2024)
• Windsurfing Advanced Racing (4th February 2025)
• Windsurfing Foiling First Flights (4th February 2025)
• Windsurfing Foiling Performance Flights (4th February 2025)
• Windsurfing Foiling Sustained Flights (4th February 2025)
• Windsurfing Intermediate Racing (4th February 2025)
• Windsurfing Start Racing (4th February 2025)
• Windward (25th October 2024)
• Wingfoiling First Flights (4th February 2025)
• Wingfoiling Sustained Flights (4th February 2025)
• Working End (25th October 2024)
• World Geodetic System 1984 (25th October 2024)
• World Sailing (25th October 2024)
• X-Ray (25th October 2024)
• Yacht (25th October 2024)
• Yachtmaster Ocean Theory (4th February 2025)
• Yankee (25th October 2024)
• Yard (25th October 2024)
• Yatchsman's Gale (25th October 2024)
• Yawl (25th October 2024)
• Youth Sailing Scheme - Start Sailing Stage 1 (4th February 2025)
• Youth Sailing Scheme - Start Sailing Stage 2 (4th February 2025)
• Youth Sailing Scheme - Start Sailing Stage 3 (4th February 2025)
• Youth Sailing Scheme - Start Sailing Stage 4 (4th February 2025)
• Youth Sailing Scheme Start Racing (4th February 2025)
• Youth Windsurfing Stage 1 (4th February 2025)
• Youth Windsurfing Stage 2 (4th February 2025)
• Youth Windsurfing Stage 3 (4th February 2025)
• Youth Windsurfing Stage 4 (4th February 2025)
• Zulu (25th October 2024)