Question 6 GLI06 - Master or Mate of LT 100 GRT

The Correct Answer is A **Why option A ("Sound two prolonged followed by two short blasts") is correct:** This scenario is governed by the International Regulations for Preventing Collisions at Sea (COLREGs), specifically Rule 9(e)(i) regarding maneuvering in narrow channels, and Rule 34(c) regarding maneuvering signals. Rule 9(e)(i) states that in a narrow channel, when overtaking a vessel that has to take action to permit safe passing, the overtaking vessel (you) must signal their intention. Rule 34(c) specifies the necessary signals for vessels maneuvering in narrow channels under Rule 9(e)(i): * **Two prolonged blasts followed by one short blast** means: "I intend to overtake you on your starboard side." * **Two prolonged blasts followed by two short blasts** means: **"I intend to overtake you on your port side."** Since the intention is to overtake on the port side, the correct signal is sounding two prolonged blasts followed by two short blasts. **Why the other options are incorrect:** * **B) Sound two prolonged blasts on the whistle:** This signal, defined by COLREG Rule 34(a), is the mandatory signal used to alert vessels approaching a bend or obstruction that obscures vision. It does not communicate an intention to overtake on a specific side. * **C) No signal is necessary:** This is incorrect. Rule 9(e)(i) explicitly mandates that the overtaking vessel must signal its intention if the vessel being overtaken has to take action to permit safe passing. * **D) Sound two short blasts:** Under Rule 34(a), two short blasts means "I am altering my course to port." While this is a maneuvering signal, it does not communicate the required intention to overtake on the port side within a narrow channel as mandated by Rule 9(e)(i) and 34(c).