USCG OUPV / Master Captain Licence Exam Questions & Answers 2026 (11–20)

Question 1

A trawler when trawling shows which all-round lights?

TheoryPractice · Accepted Answer

Red over white in a vertical line. A vessel trawling shows all-round green over all-round white lights (Rule 26(b)(i)).

Question 2

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

TheoryPractice · Accepted Answer

Four. A power-driven vessel over 50m must show two masthead lights, the aft one higher than the forward (Rule 23(a)).

Question 3

What is the arc of the stern light?

TheoryPractice · Accepted Answer

112.5 degrees. The stern light covers 135 degrees, centered on the vessel's stern (Rule 21(c)).

Question 4

Which side is the green sidelight shown on?

TheoryPractice · Accepted Answer

Both sides. The green sidelight is on the starboard (right) side of the vessel (Rule 21(b)).

Question 5

A vessel less than 7 meters in length whose maximum speed does not exceed 7 knots may show only which light?

TheoryPractice · Accepted Answer

A yellow all-round light. A vessel under 7m with max speed under 7 knots need only show a white all-round light, or at minimum have a flashlight ready (Rule 23(d)).

Question 6

A power-driven vessel making way shows sidelights with what combined sector?

TheoryPractice · Accepted Answer

270 degrees total. Port and starboard sidelights each cover 112.5 degrees for a total combined arc of 225 degrees from ahead.

Question 7

A sailing vessel under 20 meters may combine sidelights and stern light into what?

TheoryPractice · Accepted Answer

A combined red/green lantern forward. A sailing vessel under 20m may use a tricolor lantern at or near the top of the mast (Rule 25(b)).

Question 8

What is the color of the masthead light?

TheoryPractice · Accepted Answer

Yellow. The masthead light (also called steaming light) is white, visible over 225 degrees (Rule 21(a)).

Question 9

A sailing vessel also using its engine (motoring) must show which additional light or indication?

TheoryPractice · Accepted Answer

A masthead light. A sailing vessel under power shows a cone point downward during daylight, and at night must show masthead light (Rule 25(e)).

Question 10

What shape does a vessel at anchor display by day?

TheoryPractice · Accepted Answer

A cylinder. A vessel at anchor displays a black ball shape by day (Rule 30(a)).

USCG OUPV / Master Captain Licence Exam Questions & Answers 2026 (11–20)

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