Question 9 GLI05 - Master or Mate of LT 200 GRT

The Correct Answer is D **Why option D ("Both vessels alter course to starboard") is correct:** Rule 14 (Head-on situation) of both the International Regulations for Preventing Collisions at Sea (COLREGs) and the Inland Rules governs situations where two power-driven vessels are meeting on reciprocal or nearly reciprocal courses so as to involve a risk of collision. The rule explicitly states: "each shall alter her course to starboard so that each shall pass on the port side of the other." This mandatory action ensures a predictable and safe passing arrangement, confirming that altering course to starboard is the required maneuver. **Why each of the other options is incorrect:** * **A) Sound at least five short and rapid blasts:** This signal (Rule 34) is the Danger/Doubt signal, indicating that the sounding vessel is in doubt as to the other vessel's actions or intentions, or believes a collision risk exists. While appropriate to sound if the required action (altering course to starboard) is not taken immediately or confusion persists, it is a cautionary signal, not the required maneuver itself. * **B) Back down:** Reversing engines ("backing down") is a maneuver used to slow or stop the vessel, which may be required as part of "taking all appropriate steps to avoid collision" (Rule 8/19), but it is not the *primary and mandated action* when meeting head-on under Rule 14. The primary action is altering course to starboard. * **C) Both vessels shall stop their engines:** Stopping engines falls under "taking all appropriate steps" (Rule 8), particularly when maneuvering space is limited or collision is imminent. However, simply stopping the engine may not be sufficient to avoid collision and is not the mandatory, defining action prescribed by Rule 14 for a head-on encounter.