USCG OUPV / Master Captain Licence Exam Questions & Answers 2026 (1–10)

Question 1

What is the arc of visibility for sidelights?

TheoryPractice · Accepted Answer

135 degrees. Sidelights (red to port, green to starboard) each cover 112.5 degrees from dead ahead.

Question 2

A power-driven vessel underway less than 50 meters in length must exhibit how many masthead lights?

TheoryPractice · Accepted Answer

Two masthead lights. A power-driven vessel under 50m may show one masthead light (Rule 23(a)).

Question 3

A sailing vessel underway must show which lights?

TheoryPractice · Accepted Answer

Sidelights and stern light. A sailing vessel shows sidelights and a stern light (Rule 25). No masthead light when under sail only.

Question 4

A vessel not under command shows which lights?

TheoryPractice · Accepted Answer

One red and one white light in a vertical line. A vessel not under command shows two all-round red lights in a vertical line (Rule 27(a)).

Question 5

What lights does a vessel constrained by her draft display?

TheoryPractice · Accepted Answer

Two all-round red lights in a vertical line. A vessel constrained by draft shows three all-round red lights in a vertical line (Rule 28).

Question 6

What color is the stern light?

TheoryPractice · Accepted Answer

Yellow. The stern light is a white light visible over 135 degrees centered on the stern (Rule 21(c)).

Question 7

A vessel engaged in towing with the tow exceeding 200 meters shows which lights?

TheoryPractice · Accepted Answer

Two masthead lights in a vertical line forward. When the tow exceeds 200m, the towing vessel shows three masthead lights forward in a vertical line (Rule 24(a)).

Question 8

What color are the lights for a vessel restricted in her ability to maneuver when not making way?

TheoryPractice · Accepted Answer

Three white lights in a vertical line. A vessel restricted in ability to maneuver shows an all-round red, white, and red (top to bottom) in vertical line (Rule 27(b)).

Question 9

What is the minimum visibility range for the masthead light on a vessel 50 meters or more in length?

TheoryPractice · Accepted Answer

5 miles. Masthead lights on vessels 50m or more must be visible at 6 miles (Annex I).

Question 10

A vessel engaged in fishing (other than trawling) underway shows which lights?

TheoryPractice · Accepted Answer

Two all-round red lights in a vertical line. A fishing vessel (non-trawling) shows all-round green over white, plus sidelights and stern when making way (Rule 26(b)).

USCG OUPV / Master Captain Licence Exam Questions & Answers 2026 (1–10)

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