Disable ads (and more) with a membership for a one time $2.99 payment
What does one prolonged blast (4-6 seconds) signal?
Engine is in reverse
Warning (entering or exiting a blind turn)
Altering course to Starboard
Power-driven vessel operating in low visibility
The correct answer is: Warning (entering or exiting a blind turn)
One prolonged blast (4-6 seconds) signals a warning for entering or exiting a blind turn. Option A (Engine is in reverse) is incorrect because one prolonged blast is not used to indicate reverse. Option C (Altering course to Starboard) is incorrect because altering course to Starboard is signaled by two short blasts followed by one prolonged blast. Option D (Power-driven vessel operating in low visibility) is incorrect because a power-driven vessel operating in low visibility is indicated by three short blasts.