DWO Navigation Rules 2 — Questions and Answers
Question 1: Under Rule 18, which vessel is NOT required to keep out of the way of a vessel restricted in her ability to maneuver?
- A vessel not under command (Correct answer)
- A vessel engaged in fishing
- A power-driven vessel underway
- A sailing vessel
Correct answer: A vessel not under command
A vessel not under command is exempted from the general duty to keep clear because she herself cannot maneuver.
Question 2: What is the minimum sound signal equipment required for a vessel less than 12 meters in length?
- Whistle and bell
- Whistle only
- Bell only
- Any means of making an efficient sound signal (Correct answer)
Correct answer: Any means of making an efficient sound signal
Rule 33 allows vessels under 12 meters to carry any efficient sound-signaling device in lieu of a whistle or bell.
Question 3: A vessel approaching a bend where other vessels may be obscured should sound which signal?
- Two prolonged blasts
- One prolonged blast (Correct answer)
- Three short blasts
- One short blast
Correct answer: One prolonged blast
Rule 34(e) requires one prolonged blast when approaching a bend or area where other vessels may be obscured.
Question 4: In a crossing situation between two power-driven vessels, the vessel that has the other on her starboard side shall:
- Sound two short blasts and maintain course
- Keep out of the way and avoid crossing ahead of the other vessel (Correct answer)
- Increase speed to pass ahead
- Alter course to starboard
Correct answer: Keep out of the way and avoid crossing ahead of the other vessel
Rule 15 requires the give-way vessel (other vessel on her starboard) to keep out of the way and avoid crossing ahead.
Question 5: What color is the sternlight required by the Navigation Rules?
- Red
- Green
- White (Correct answer)
- Yellow
Correct answer: White
Rule 21 defines a sternlight as a white light showing aft over an arc of 135 degrees.
Question 6: A vessel engaged in towing whose tow extends more than 200 meters astern shall exhibit which dayshape?
- A ball
- A diamond (Correct answer)
- A cylinder
- Two balls in a vertical line
Correct answer: A diamond
Rule 24(c) requires a diamond shape aloft on a towing vessel whose tow exceeds 200 meters in length.
Question 7: Under the Inland Rules, a vessel operating in a narrow channel should keep as near to the outer limit of which side as is safe?
- The port side
- The starboard side (Correct answer)
- The centerline
- The windward side
Correct answer: The starboard side
Rule 9 requires vessels in narrow channels to keep to the starboard side of the channel.
DWO Navigation Rules 2
Under Rule 18, which vessel is NOT required to keep out of the way of a vessel restricted in her ability to maneuver?