BOTH INTERNATIONAL & INLAND When is your vessel travelling at a "safe speed" as defined in the COLREGS?

Correct Answer: Option D — when you can take proper and effective action to avoid collision

Rule 6 defines safe speed as the speed at which a vessel can take proper and effective action to avoid collision and be stopped within a distance appropriate to the prevailing circumstances. This is the fundamental standard for all vessels, ensuring sufficient time for reaction to any developing danger.