Light List

Question 1

what does IALA stand for?

Answer 1

International Association of Marine Aids to Navigation and Lighthouse Authorities

Question 2

How are ICW aids arranged

Answer 2

north to south

Question 3

What are bridge lights?

Answer 3

• red for piles and closed draw bridges
• green for center of the channel and open draw bridges
• preferred channel is marked with 3 whites over the green

Question 4

What is a MRASS sound signal?

Answer 4

mariner radio activated sound signals

Question 5

What is a flash?

Answer 5

Brief light followed by a longer darkness period

Question 6

what is occulting?

Answer 6

Brief darkness followed by a longer lighted period

Question 7

What are the characteristics of an isolated danger mark?

Answer 7

red and black with white light

Question 8

What is an ISO phase light?

Answer 8

equal light and dark