BOTH INTERNATIONAL & INLAND What signal indicates doubt that sufficient action is being taken by another vessel to avoid collision?
⢠Rule 34 â Maneuvering and Warning Signals in the Navigation Rules ⢠Difference between maneuvering signals (I am altering course/engines) and warning/doubt signals (I doubt your intentions) ⢠The meaning of short blast, prolonged blast, and how many blasts are used for each purpose
⢠First, ask yourself: which signals (1, 2, or 3 short blasts, etc.) are specifically used to indicate your own course or engine movements, and which are used ONLY when you are unsure of the other vesselâs actions? ⢠Look at each choice and decide: is this something Iâd use to say what I am doing (turning, backing, leaving a berth), or to say I donât understand what you are doing? ⢠Recall from Rule 34: how many blasts, and of what type, are required for the âdoubtâ or âdangerâ signalâdoes it involve prolonged blasts, short blasts, or a combination?
⢠Verify in Rule 34(d) which signal is prescribed when there is doubt about the other vesselâs intentions or actions. ⢠Confirm that prolonged blasts are generally associated with power-driven vessel underway in restricted visibility or leaving a dock, not with doubt about collision avoidance. ⢠Ensure the correct option uses short and rapid blasts, and check how many are specified in the rule for a doubt/danger situation.
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