Maritime Questions › Day Skipper Buoyage Passage

What does an Isolated Danger Mark look like and what does it mean?

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. Red and white vertical stripes, no topmark, indicates safe water ahead

B. Yellow and black, single cone, marks a cable route

C. Black and red horizontal bands, two black spheres topmark, Fl(2) white light — a danger with navigable water all around it

D. All-green with a cross topmark

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

C. Yellow with a single cross topmark

D. Green conical with green light

What are the characteristics of a North Cardinal mark?

A. All black, cone point up, quick flashing

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

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

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

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