Question 41 OSV01 - Master/Chief Mate - Offshore Supply Vessels

The Correct Answer is A. **Explanation for A (The vessel's searchlight):** Rule 36 of the International Regulations for Preventing Collisions at Sea (COLREGs) specifically permits a vessel to attract the attention of another vessel by "any sound signal or light which cannot be mistaken for any signal authorized elsewhere in these Rules." Using a searchlight to direct a beam towards the danger or another vessel (without causing glare that endangers navigation) is a standard, non-distress method of attracting attention and fulfilling the requirement of Rule 36. **Why the other options are incorrect:** * **B) A red star shell:** This is a widely recognized and specifically authorized signal of **distress** under Annex IV of COLREGs. The question asks for a signal *other than a distress signal*. * **C) A burning barrel:** This is a recognized international signal of **distress** under Annex IV (Rule 37), specifically a "flame on the vessel (as from burning tar or oil, etc.)." * **D) An orange smoke signal:** This is a recognized international signal of **distress** under Annex IV (Rule 37).