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USCG Exam Practice · Rule 27 — NUC and RAM (lights)

A vessel not under command (NUC), when making way through the water at night, is required to exhibit which lights?

  1. ATwo all-round red lights in a vertical line, plus sidelights and a sternlight✓ correct
  2. BTwo all-round red lights in a vertical line only
  3. CThree all-round lights (red-white-red) in a vertical line, plus sidelights and a sternlight
  4. DTwo all-round red lights in a vertical line, plus a masthead light, sidelights, and a sternlight

Why A is correct

Under 33 CFR §83.27(a), a NUC vessel exhibits two all-round red lights in a vertical line at all times, and when making way through the water adds sidelights and a sternlight. No masthead light is required for NUC status, and the red-white-red combination is the RAM signal, not NUC.

Cited:33 CFR §83.27

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