Maritime and Marine Navigation Rules (COLREGS) 2

Question 1

In a crossing situation under COLREGS, which vessel is the give-way vessel?

Accepted Answer

The vessel that has the other on her starboard side

Answer

Rule 15 requires the vessel that has the other on her own starboard side to keep out of the way.

Question 2

What is the arc of visibility for a vessel's sidelights?

Accepted Answer

112.5 degrees each side

Answer

COLREGS Annex I specifies sidelights must illuminate an arc of 112.5 degrees from dead ahead.

Question 3

How many short blasts constitute the danger signal under COLREGS?

Accepted Answer

Five or more short blasts

Answer

Rule 34(d) states five or more short and rapid blasts is the signal of doubt or danger.

Question 4

What does an all-round white light on a vessel at anchor indicate if the vessel is 50 meters or more in length?

Accepted Answer

Forward all-round white light and a separate all-round white light aft at a lower height

Answer

Rule 30 requires vessels 50 meters or more at anchor to show an all-round white light forward and a lower all-round white light aft.

Question 5

Under the Inland Rules, what is a special flashing light?

Accepted Answer

A yellow light flashing 50-70 times per minute used by barges

Answer

Inland Rule 21 defines the special flashing light as a yellow light flashing 50-70 times per minute shown by push-ahead or towed barges.

Maritime and Marine Practice Test