Question 1 RVR05 - Master of LT 100 GRT

The Correct Answer is B **Explanation for B (Correct Option):** Option B, "take all way off, if necessary," is the action required by the **International Regulations for Preventing Collision at Sea (COLREGs)**, Rule 19 (Conduct of vessels in restricted visibility). Rule 19(e) states: "Except where it has been determined that a risk of collision does not exist, every vessel which hears apparently forward of her beam the fog signal of another vessel, or which cannot avoid a close-quarters situation with another vessel forward of her beam, shall reduce her speed to a minimum at which she can be kept on her course. **She shall if necessary take all her way off and in any event navigate with extreme caution until danger of collision is over.**" Hearing a fog signal forward of the beam indicates that a vessel is approaching and risk of collision may exist. The primary and explicit requirement is to reduce speed/stop and proceed with extreme caution, which is encapsulated by taking all way off if necessary. **Explanation for Other Options (Incorrect):** * **A) stop your engines:** While stopping the engines is often a necessary step in taking all way off, the regulation requires reducing speed to a minimum or taking all way off. Stopping the engines alone (while retaining forward momentum) is not the comprehensive regulatory requirement. Furthermore, maintaining steerage (minimal speed) may be necessary, making outright engine stoppage potentially non-compliant or impractical compared to the full requirement of minimizing speed/taking all way off. * **C) begin a radar plot:** While prudent seamanship in restricted visibility requires using radar if fitted (Rule 5 and Rule 7(b)), the immediate, mandatory action required specifically upon hearing a fog signal forward of the beam when risk of collision exists is the extreme reduction of speed or stopping (Rule 19(e)). Radar plotting is a continuous tool for assessing risk (required by Rule 7(b) in restricted visibility), but it is not the *required physical maneuver* triggered by hearing the sound signal in this specific context. * **D) All of the above:** Since options A and C are not the primary, mandatory actions dictated by Rule 19(e), this option is incorrect.