Maritime Questions › Day Skipper Buoyage Passage

What is a danger bearing and how is it used?

Q: In IALA Region A (UK, Europe, Africa, most of Asia), what does a port hand lateral mark look like?

Red can or pillar with flat top, red light (any rhythm) IALA Region A: port hand marks are RED, can/pillar shape, red light any rhythm. Keep them to port when entering harbour (coming from sea). Starboard hand marks are GREEN, conical, green light. Memory: "Red right returning" applies in Region B (Americas) — the OPPOSITE of Region A.

A. A bearing to a waypoint that must be maintained exactly throughout a passage

B. A pre-calculated compass bearing of a charted object — if the vessel's bearing of that object is more (or less) than the danger bearing, the vessel is standing into danger

C. The maximum allowable cross-track error on a GPS route

D. The bearing of the nearest hazard from the closest port of refuge

In IALA Region A (UK, Europe, Africa, most of Asia), what does a port hand lateral mark look like?

A. Red and white vertically striped

B. Green conical with green light

C. Yellow with a single cross topmark

D. Red can or pillar with flat top, red light (any rhythm)

What are the characteristics of a North Cardinal mark?

A. Black over yellow, two cones points UP, Fl(Q) or VQ white light — pass to the NORTH

B. Yellow over black, two cones points DOWN, occulting white

C. Black and yellow horizontal bands, cone point up, group flashing (3)

D. All black, cone point up, quick flashing

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