BOTH INTERNATIONAL & INLAND Which of the the signals, other than a distress signal, can be used by a vessel to attract attention?

Correct Answer: Option B — The vessel's searchlight

Rule 36 permits any vessel to make light or sound signals to attract the attention of another vessel, provided they cannot be mistaken for authorized signals. The use of a searchlight is a common, accepted method for attracting attention, provided it does not dazzle or confuse other mariners.