What does a sound signal of three short blasts by such a vessel mean?
What does a sound signal of three short blasts by such a vessel mean? Three Short Blasts - This means you are operating in astern propulsion, for example backing away from a dock. One Prolonged Blast + Three Short Blasts – This is technically two different signals in succession. One prolonged blast indicates you are getting under way, and three short blasts indicate you are backing up.
What does 5 horn blows on a ship mean?
One prolonged blast is a warning signal (for example, used when coming around a blind bend or exiting a slip). Five or more short rapid blasts signal danger, or signal that you do not understand or disagree with the other boater's intentions.