Maritime and Marine Navigation Rules (COLREGS) 3

Question 1

What does a vessel constrained by her draft display in addition to normal running lights?

Accepted Answer

Three all-round red lights in a vertical line

Answer

COLREGS Rule 28 states a vessel constrained by her draft may exhibit three all-round red lights in a vertical line.

Question 2

Under COLREGS, what is the responsibility of the stand-on vessel in a crossing situation?

Accepted Answer

Maintain course and speed, but take action to avoid collision if necessary

Answer

Rule 17 requires the stand-on vessel to maintain course and speed but allows action when collision becomes apparent.

Question 3

What is the required arc for a stern light under COLREGS?

Accepted Answer

135 degrees centered on dead astern

Answer

COLREGS Annex I specifies the stern light must cover an arc of 135 degrees centered on dead astern.

Question 4

A sailing vessel underway at night shall exhibit which lights?

Accepted Answer

Sidelights and a stern light

Answer

Rule 25 requires a sailing vessel underway to exhibit sidelights and a stern light.

Question 5

Under COLREGS, which vessel has right-of-way over a sailing vessel?

Accepted Answer

A vessel not under command

Answer

Rule 18 establishes that vessels not under command have the highest priority and must be avoided by all other vessels including sailing vessels.

Maritime and Marine Practice Test