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Buoyage

Paul Brown. Buoyage. Coming up: A brief introduction to buoyage The different types of marks and their usage Distinguishing marks by day and night. IALA Regions . World split into 2 regions: IALA A (most of the world) and IALA B (Americas, Japan, Korea, Philippines)

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Buoyage

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  1. Paul Brown Buoyage • Coming up: • A brief introduction to buoyage • The different types of marks and their usage • Distinguishing marks by day and night

  2. IALA Regions • World split into 2 regions: IALA A (most of the world) and IALA B (Americas, Japan, • Korea, Philippines) • Few differences between these systems, the most striking being the • Direction of Buoyage • Marks distinguished by Shape, Colour, Light, Topmark

  3. Lateral Marks Used to show well established channels, indicating the port and starboard sides of the channel • Port Mark • Always red • Can-shaped topmark • Red flashing light • Starboard Mark • Always green • Cone-shaped topmark • Green flashing light

  4. Safe Water Mark Isolated Danger Mark • The water all around is free from • obstruction or shallows • Single red sphere topmark • Calm, white light • Vertical stripes – safe! • Marks an isolated danger, such • as an old anchor, a large rock • Water around the mark should be • safe, but do not pass too close • 2 black spheres for topmark • White light showing group of 2 flashes • Horizontal stripes – danger!

  5. Cardinal Marks

  6. Cardinal Marks (2) • Named after the cardinal points of the compass • Each mark has different topmark, stripe and light pattern • Light patterns as per hours of the clock(12, 3, 6, 9) • All lights flash white, quick or very quick • South Cardinal has long flash at end to avoid confusion • Cardinals might be used to indicate split in channel, end of a bank/shoal, large wreck or submerged object

  7. Special Mark • Indicates special area – e.g. wreck, sewage pipe • Mark is yellow in colour • Single yellow cross topmark • Light is yellow, any rhythm other than those used for cardinal, isolated danger or safe water marks

  8. Summary Lateral Marks: Used to indicate established channels Starboard – green colour – cone shaped – green light Port – red colour – can shaped – red light Safe Water Mark: Shows that water all around in clear from obstruction Red and white vertical stripes – red sphere top mark – long white flash / 10s Isolated Danger Mark: Indicates an isolated danger that has clear water all around Black and red horizontal stripes – 2 black spheres topmark – white flash groups of 2 Special Mark: Indicates special area, could be cable or pipelines, wreck Yellow in colour – yellow cross topmark – yellow flashing light

  9. Questions? Further Reading: • The RYA Powerboat Handbook – Paul Glatzel • The Ocean Navigation Guide – Tim Bartlett • The Day Skipper – Tom Cunliffe

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