Sound signalling devices lrg

Grunt Productions 2008

Sound Signal Devices

A Brief By Lance Grindley



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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.



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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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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.”


Maneuvering and Warning Signals

Alter to Starboard – Alter to Starboard –

1 short blasts1 short blasts



Alter to Port – Alter to Port – 2 short blasts2 short blasts



Operating astern propulsion - Operating astern propulsion - 3 short blasts3 short blasts



Overtaking in a narrow channel or fairwayOvertaking in a narrow channel or fairway

Vessel to be Vessel to be OvertakenOvertaken

Overtaking Overtaking VesselVessel


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



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



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




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





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


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



1


Anchor Fog Signals for vessel 100mtrs or more in length

2


A vessel aground: A vessel aground: Less than 100 mtrs.Less than 100 mtrs.



Aground Fog Signals for vessel 100mtrs or more in length

12



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






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.

Sound signalling devices lrg

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