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Fog Signals IR

Fog Detector Light —HP Fog Light —» IP General
1	o A	Position of fog signal. Type of fog signal not stated	t Fog Sig	451 451.2 452.8 N1

Types of Fog Signals, with Abbreviations
10	Explos	Explosive	fGun	452.1 N3 N10
11	Dia	Diaphone		452.2 N9
12	Siren	Siren		452.3 N11
13	Horn	Horn (nautophone, reed, tyfon)	fNauto fE.F. Horn f Tyfon fReed	452.4 N8 N12-13a N16
14	Bell	Bell		452.5 N14 L3
15	Whis	Whistle		452.6 N15 L4
16	Gong	Gong		452.7 N17 L3a

Examples of Fog Signal Descriptions
20	A FI.3s70m29M v Siren Mo(N)60s X	Siren at a lighthouse, giving a long blast followed by a short one (N), repeated every 60 seconds		452.3 453.3 NI N11
21	^ABell X	Wave-actuated beli buoy The provision of a legend indicating number of emissions, and sometimes the period, distinguishes automatic beli or whistle buoys from those actuated by waves		452.5 453 454.1 | L3 NI 4
22	/ Q(6)+LFI.15s ..iM- Horn(1)15sWhis v YB^ X	Light buoy, with horn giving a single blast every 15 seconds, in conjunction with a wave-actuated whistle	Reserve fog signals are fitted to certain buoys Only those actuated by waves are charted	452.4 453,1 454.3 L4 N1 N13
ł The Fog Signal symbol may be omitted when a description of the signal is given

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