Maritime Questions › Day Skipper Buoyage Passage

What is the key difference between an ECDIS and a standard Electronic Chart System (ECS) used on leisure craft?

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. There is no legal difference — any electronic chart display is equivalent to paper charts

B. ECS is more accurate than ECDIS for small craft navigation

C. ECDIS can only be used on vessels over 500 GT; ECS is not regulated

D. ECDIS meets IMO/SOLAS standards and can legally replace paper charts on SOLAS vessels; ECS (used on most leisure GPS plotters) cannot replace paper charts in any jurisdiction

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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