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Grunt Productions 2008
Sound Signal Devices
A Brief By Lance Grindley
Grunt Productions 2008
Sound Signal Devices
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Vessels 12 meters or more Vessels 12 meters or more shall carry a whistle shall carry a whistle andand a a bell.bell.
Grunt Productions 2008
Sound Signal Devices
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Vessels 100 meters or more Vessels 100 meters or more shall carry a whistle, a bell shall carry a whistle, a bell andand a gong. a gong.
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Grunt Productions 2008
Sound Signal Devices
MASTERMASTER
BLASTERBLASTER
!Vessels less than 12 meters Vessels less than 12 meters shall carry a “means of making shall carry a “means of making an efficient sound signal.” an efficient sound signal.”
Grunt Productions 2008
Maneuvering and Warning Signals
Alter to Starboard – Alter to Starboard –
1 short blasts1 short blasts
Grunt Productions 2008
Maneuvering and Warning Signals
Alter to Port – Alter to Port – 2 short blasts2 short blasts
Grunt Productions 2008
Maneuvering and Warning Signals
Operating astern propulsion - Operating astern propulsion - 3 short blasts3 short blasts
Grunt Productions 2008
Maneuvering and Warning Signals
Overtaking in a narrow channel or fairwayOvertaking in a narrow channel or fairway
Vessel to be Vessel to be OvertakenOvertaken
Overtaking Overtaking VesselVessel
Grunt Productions 2008
Danger signal- at least 5 short and rapid blasts if: Danger signal- at least 5 short and rapid blasts if:
# not in agreement with proposed maneuver not in agreement with proposed maneuver
# fail to understand intentions of other vessel fail to understand intentions of other vessel
# in doubt if sufficient action is being takenin doubt if sufficient action is being taken
Maneuvering and Warning Signals
Grunt Productions 2008
STACKSSTACKS
TREESTREES
BLDGS.
Nearing a bend or area where other Nearing a bend or area where other vessels may be obscured by an vessels may be obscured by an obstruction - 1 prolonged blastobstruction - 1 prolonged blast
Maneuvering and Warning Signals
Grunt Productions 2008
Power-driven vessel making way - Power-driven vessel making way - 1 prolonged blast1 prolonged blast
Power-driven vessel underway but stopped and not Power-driven vessel underway but stopped and not making way (drifting) - making way (drifting) - 2 prolonged blasts2 prolonged blasts
Signals in Restricted Visibility
At least every 2 minutesAt least every 2 minutes
At least every 2 minutesAt least every 2 minutes
Grunt Productions 2008
Signals in Restricted Visibility
Any of the following vessels – Any of the following vessels –
1 prolonged & 2 short blasts1 prolonged & 2 short blasts: :
not under command not under command
restricted in ability to maneuver restricted in ability to maneuver
engaged in fishing engaged in fishing
towing or pushing another towing or pushing another
sailing vesselsailing vessel
At least every 2 minutesAt least every 2 minutes
Grunt Productions 2008
Signals in Restricted Visibility
At least every 2 minutesAt least every 2 minutes
A vessel towing or pushing - A vessel towing or pushing - 1 prolonged & 2 short1 prolonged & 2 short
A vessel being towed - A vessel being towed - 1 prolonged & 3 short1 prolonged & 3 short
Grunt Productions 2008
A vessel at anchor: A vessel at anchor:
ring a bell for 5 seconds at least every 1 minutering a bell for 5 seconds at least every 1 minute
may also sound 1 short, 1 prolonged, 1 short blastsmay also sound 1 short, 1 prolonged, 1 short blasts
Does not apply to vessels less than 12 meters anchored in a Does not apply to vessels less than 12 meters anchored in a designated anchoragedesignated anchorage
Signals in Restricted Visibility
Grunt Productions 2008
1
Signals in Restricted Visibility
Anchor Fog Signals for vessel 100mtrs or more in length
2
Grunt Productions 2008
A vessel aground: A vessel aground: Less than 100 mtrs.Less than 100 mtrs.
Signals in Restricted Visibility
Grunt Productions 2008
Aground Fog Signals for vessel 100mtrs or more in length
12
Signals in Restricted Visibility
Grunt Productions 2008
Pilot vessel making way - Pilot vessel making way - 1 prolonged blast + 4 short blasts1 prolonged blast + 4 short blasts
Pilot vessel underway but stopped and not making way Pilot vessel underway but stopped and not making way (drifting) - (drifting) - 2 prolonged blasts + 4 short blasts2 prolonged blasts + 4 short blasts
Signals in Restricted Visibility
At least every 2 minutesAt least every 2 minutes
At least every 2 minutesAt least every 2 minutes
Grunt Productions 2008
Signals in Restricted Visibility
A vessel less than 12 meters is not obliged to A vessel less than 12 meters is not obliged to give these restricted visibility signals but give these restricted visibility signals but shall make some other efficient sound signal shall make some other efficient sound signal at least every 2 minutes.at least every 2 minutes.