✓ TradeExamPro

TradeExamPro › Maritime, Rail & Radio › Captain's licence (OUPV)

Rules lights sounds practice questions

40 questions from the captain's licence (oupv) practice test.

Rules lights sounds practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

Which lights must a power-driven vessel 60 metres long show when underway at night?

  1. One masthead light, sidelights and a sternlight, with no second masthead light
  2. Two masthead lights, the forward one higher, sidelights and a sternlight
  3. An all-round white light and sidelights in place of all other lights
  4. Two masthead lights, the after one higher, sidelights and a sternlight
Show the answer

D. Two masthead lights, the after one higher, sidelights and a sternlight

A power-driven vessel of 50 metres or more must carry a second masthead light abaft of and higher than the forward one, plus sidelights and a sternlight. Under 50 metres the second masthead light is optional. The after light is always the higher, which lets you judge her heading.

Reference: Navigation Rules, Rule 23(a)

A power-driven vessel 9 metres long is underway at night. Which simplified lighting do the Rules allow her in place of a masthead light and sternlight?

  1. An all-round white light, together with sidelights
  2. An all-round white light alone, with no sidelights
  3. A tricolour lantern carried at the masthead
  4. Sidelights alone, with no white light shown
Show the answer

A. An all-round white light, together with sidelights

Rule 23 lets a power-driven vessel of less than 12 metres show an all-round white light and sidelights instead of a separate masthead light and sternlight. The tricolour lantern is for sailing vessels under sail, and the white light alone is allowed (internationally) only for very small, slow craft.

Reference: Navigation Rules, Rule 23

Which lights must a 10-metre sailing vessel show when underway under sail alone at night?

  1. A masthead light, sidelights and a sternlight, as for a power-driven vessel
  2. An all-round white light at the masthead and sidelights below it
  3. Sidelights and a sternlight, which may be combined in one masthead lantern
  4. An all-round red light over an all-round green light and nothing else
Show the answer

C. Sidelights and a sternlight, which may be combined in one masthead lantern

A sailing vessel underway shows sidelights and a sternlight and no white masthead light; if under 20 metres she may combine them in a single tricolour lantern at or near the masthead. A white masthead light would mark her as power-driven. Red over green is an optional extra, never a substitute.

Reference: Navigation Rules, Rule 25(a) and (b)

Other topics