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Learning Flashcards for
Navigation RulesSound Signals
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Denis E. Vogelm/v Amble
© 2003
Directions:Click to move to the next slide, then click a second time to
see the correct answer. A third click takes you to the following slide. Speaking the correct answer aloud will aid
memory retention.
Denis E. Vogelm/v Amble
© 2003
Vessels in sight of each other
))One Short Blast
I am altering course to STARBOARD
Vessels in sight of each other
)) ))Two Short Blasts
I am altering course to PORT
Vessels in sight of each other
)) )) ))Three Short Blasts
I am operating ASTERN PROPULSION
Vessels in sight of each other
)) )) )) )) ))….Five or more Short Blasts
WAKE UP SIGNAL. One vessel not complying with rules, warning that actions
are not understood.
Vessels in sight of each other in a Narrow Channel or Fairway
))))) ))))) ))Two Long & One Short Blast
I intend to overtake on your STARBOARD side
Vessels in sight of each other in a Narrow Channel or Fairway
))))) ))))) )) ))Two Long & Two Short Blasts
I intend to overtake on your PORT side
Vessels in sight of each other in a Narrow Channel or Fairway
))))) )) ))))) ))One Long, One Short, One Long,
One Short Blast
Response to intent to pass meaning YES it is safe to pass
Vessels in sight of each other in a Narrow Channel or Fairway
)) )) )) )) ))…Five or more Short Blasts
In a passing situation, you feel it is NOT SAFE for the other boat to pass
Vessels approaching a BLIND CORNER, large ship, marina or typhoon shelter entrance.
)))))One Long Blast
Signal should be answered with same by approaching vessel in hearing distance
Power vessel making way
FOG Sound SignalsWhat is the signal used if you are a….
Long blast every 2 minutes or less
Power vessel NOT making way
Two long blasts every 2 minutes or less
Not under command, restricted or sailing
One long & two short every 2 minutes or less
Large vessel at anchorRapid bell for 5
seconds, gong at stern if 100+ m long
EndSound Signals
Denis E. Vogelm/v Amble
© 2003
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