Maritime and Marine Navigation Rules (COLREGS) 2 — Questions and Answers
Question 1: In a crossing situation under COLREGS, which vessel is the give-way vessel?
- The vessel that has the other on her starboard side (Correct answer)
- The vessel that has the other on her port side
- The slower vessel
- The smaller vessel
Correct answer: The vessel that has the other on her starboard side
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?
- 112.5 degrees each side (Correct answer)
- 135 degrees each side
- 180 degrees each side
- 90 degrees each side
Correct answer: 112.5 degrees each side
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?
- Five or more short blasts (Correct answer)
- Three short blasts
- Four short blasts
- Two short blasts
Correct answer: Five or more short blasts
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?
- Forward all-round white light and a separate all-round white light aft at a lower height (Correct answer)
- A single all-round white light amidships
- Two all-round white lights side by side
- Three all-round white lights in a triangle
Correct answer: Forward all-round white light and a separate all-round white light aft at a lower height
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?
- A yellow light flashing 50-70 times per minute used by barges (Correct answer)
- A white light flashing once per second on towing vessels
- A red light flashing on vessels in distress
- A blue light used by law enforcement vessels
Correct answer: A yellow light flashing 50-70 times per minute used by barges
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.
Question 6: When must a power-driven vessel operating in restricted visibility sound her fog signal?
- At intervals of not more than 2 minutes, one prolonged blast (Correct answer)
- At intervals of not more than 1 minute, two short blasts
- At intervals of not more than 2 minutes, two prolonged blasts
- At intervals of not more than 3 minutes, one prolonged blast
Correct answer: At intervals of not more than 2 minutes, one prolonged blast
Rule 35 requires power-driven vessels making way in restricted visibility to sound one prolonged blast at intervals of not more than 2 minutes.
Maritime and Marine Navigation Rules (COLREGS) 2
In a crossing situation under COLREGS, which vessel is the give-way vessel?