BOTH INTERNATIONAL & INLAND One of the signals, other than a distress signal, that can be used by a vessel to attract attention is a(n) __________.

Correct Answer: Option D — searchlight

COLREGS Annex IV describes additional signals that may be used or exhibited to signal distress, but Rule 36 allows any vessel to use searchlights or other attention-attracting lamps provided they cannot be mistaken for navigational aids or standard lights.