Question 12 ONC01 - Master/Chief Mate Unlimited Tonnage

The Correct Answer is A **Why option A ("take all way off, if necessary") is correct:** This question references Rule 19 of the COLREGS (Conduct of Vessels in Restricted Visibility). Rule 19(e) specifically addresses actions to be taken upon hearing a fog signal forward of the beam and when risk of collision exists or cannot be avoided. The rule states that a vessel **shall reduce her speed to a minimum sufficient to keep her on her course and, if necessary, take all her way off and in any event navigate with extreme caution until danger of collision is over.** Therefore, taking all way off (stopping the vessel's movement through the water) is a mandatory requirement under these specific circumstances if necessary to avoid collision. **Why the other options are incorrect:** * **B) stop your engines:** While reducing speed and taking all way off may involve stopping the engines, merely stopping the engines is not the primary or mandatory action specified by the rule. A vessel might need to keep the engines ready or even briefly use them astern to take all way off. The focus is on taking all way off (stopping movement), not exclusively on stopping propulsion. * **C) begin a radar plot:** Rule 19(d) requires vessels detecting another vessel by radar to determine if risk of collision exists. While good seamanship always dictates using available means (like radar plotting) to assess the situation, **beginning a radar plot** is a diagnostic step, not the required navigational maneuver (action) specified under Rule 19(e) when a known risk of collision is already present (indicated by hearing the fog signal forward of the beam). * **D) All of the above:** Since options B and C are not the primary, mandated action under Rule 19(e), this option is incorrect.