What
is his Fog Signal?
(all sounded on the ships whistle
and at 2 minutes except for a vessel at anchor and aground which
sound their fog signal not exceeding 1 minute)
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A power driven vessel sounds either
2 Prolonged blasts if Underway
or
1 Prolonged blast if Making way
---------------------------------
A
hampered vessel
sounds 1 prolonged blast followed by 2 short blasts (Morse "D")
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A boat being towed
sounds 1 prolonged blast followed by 3 short blasts (Morse "B")
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A pilot vessel can
if he wishes sound his identity signal of 4 short blasts (Morse
"H")
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An oil-rig sounds
2 short blasts followed by 1 long blast (Morse "U")
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A
vessel at anchor UNDER 100 metres sounds
A
rapid ringing on the bell for 5 seconds
at intervals not exceeding one minute
-----------------------------------------
A
vessel at anchor OVER 100 metres sounds
A
rapid ringing on the bell for 5 seconds followed by
A rapid ringing on the gong for 5 seconds
at intervals not exceeding one minute
-----------------------------------------
A
vessel at anchor can sound a warning signal of
1 short - 1 prolonged - 1 short blast on the ships whistle (Morse
"R")
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A
vessel aground UNDER 100 metres sounds
3
distinct strokes on the bell followed by
A rapid ringing on the bell for 5 seconds followed by
3 distinct strokes on the bell
at intervals not exceeding one minute
-----------------------------------------
A
vessel aground OVER 100 metres sounds
3
distinct strokes on the bell followed by
A rapid ringing on the bell for 5 seconds followed by
3 distinct strokes on the bell followed by
A rapid ringing on the gong for 5 seconds
at intervals not exceeding one minute
-----------------------------------------
A
short blast is 1 second in length
A
Prolonged blast is between 4 - 6 seconds in
length
The
maximum distance you can hear a whistle is 2 miles
The
whistles frequency lies between 70 - 700Hz
| Length
of vessel in metres |
Frequency |
| |
|
| 200
metres or more in length |
70
- 200Hz |
| 75
- 200 metres in length |
130
- 350Hz |
| up
to 75 metres in length |
250
- 700Hz |
|
