Buoy lights

Question 1

What lights are on top of north cardinal marks?

Answer 1

Continuous flashing white light

Question 2

What lights are on top of east cardinal marks?

Answer 2

Three very quick white flashes in a five-second period
or
Three quick white flashes in a ten-second period

Question 3

What lights are on top of south cardinal marks?

Answer 3

Six very quick white flashes followed by a long white flash and a ten-second period
or
Six quick white flashes follow by a long white flash and a fifteen-second period

Question 4

What lights are on top of West Cardinal marks?

Answer 4

Nine very quick white flashes in a ten-second period
or
Nine quick white flashes in a fifteen-second period

Question 5

What lights are on top of an isolated danger mark?

Answer 5

White flashing light. It will flash twice in every ten second period

Question 6

What are the four possible light combinations atop a safe water mark?

Answer 6

• A long flash every ten seconds
• Occulting (more light than dark)
• Isophase (equal periods of light and dark)
• Morse A (dot followed by a dash)

Question 7

What are the lights for an emergency wreck mark?

Answer 7

Alternating blue and yellow light.
Blue for 1s, off for 1/2s, yellow for 1s, off for 1/2s, repeat.
If there are more than one of these buoys deployed on a wreck site, the lights will be coordinated

Question 8

What lights are on special marks?

Answer 8

Any rhythm other than that reserved for a white light.