Key:seamark:fog_signal:category
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| Description |
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Categories of fog signal. 
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| Group: marine navigation |
| Used on these elements |
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| Documented values: 8 |
| Useful combination |
| Status: de facto |
| Tools for this tag |
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Categories of fog signal (CATFOG).
A fog signal can be emitted from various objects:
seamark:type=buoy_cardinalseamark:type=buoy_isolated_dangerseamark:type=buoy_lateralseamark:type=buoy_safe_waterseamark:type=light_majorseamark:type=light_minorseamark:type=light_floatseamark:type=light_vessel
Values
| Category (CATFOG) | seamark:fog_signal:category | Definition | Seamark Rendering |
|---|---|---|---|
| Explosive | explosive | A signal produced by the firing of explosive charges. | 
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| Diaphone | diaphone | A diaphone uses compressed air and generally emits a powerful low-pitched sound, which often concludes with a brief sound of suddenly lowered pitch, termed the 'grunt'. | 
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| Siren | siren | A siren uses compressed air and exists in a variety of types which differ considerably in their sound and power. | 
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| Nautophone | nautophone | A horn having a diaphragm oscillated by electricity | |
| Reed | reed | A reed uses compressed air and emits a weak, high pitched sound. | |
| Tyfon | tyfon | A diaphragm horn which operates under the influence of compressed air or steam | |
| Bell | bell | A ringing sound with a short range. | 
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| Whistle | whistle | A distinctive sound made by a jet of air passing through an orifice. | 
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| Gong | gong | A sound produced by vibration of a disc when struck. | 
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| Horn | horn | A horn uses compressed air or electricity to vibrate a diaphragm and exists in a variety of types which differ greatly in their sound and power. The classification 'horn' is the generic term for fog signals nautophone, reed and tyfon. | 
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Tags to use in combination
seamark:fog_signal:group=*seamark:fog_signal:period=*seamark:fog_signal:sequence=*seamark:fog_signal:range=*seamark:fog_signal:frequency=*seamark:fog_signal:generation=*
Examples in OpenSeaMap
