What has happened to CAVOK
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What has happened to CAVOK
Lots of ATIS reports in the UK no have
Visibilty 10km
No Cloud Detected
This seems pretty much the same as CAVOK.
Any reason why CAVOK isn’t used?
Could it be that the automatic weather systems can’t detect clouds at a distance from the airport?
Visibilty 10km
No Cloud Detected
This seems pretty much the same as CAVOK.
Any reason why CAVOK isn’t used?
Could it be that the automatic weather systems can’t detect clouds at a distance from the airport?
One wonders what became of Clear and Visibility Unlimited...
- cavuman1 a/k/a Ed
- cavuman1 a/k/a Ed
CAVOK = vis + 10km, no CB, no other cloud below 5,000ft aal and no precipitation.
It's always the last bit people forget.
(Nothing to do with being in or under a TMA)
It's always the last bit people forget.
(Nothing to do with being in or under a TMA)
Only half a speed-brake
UK differences from ICAO Annex 3 (my PDF copy may not be the latest)
"The reporting of clouds in the METAR of operational significance will be introduced on 6 October 2005. From this date, the abbreviation NSC (no significant cloud) will be used if there are no clouds of operational significance, no TCU or CB; the abbreviations CAVOK and SKC are not appropriate."
"The reporting of clouds in the METAR of operational significance will be introduced on 6 October 2005. From this date, the abbreviation NSC (no significant cloud) will be used if there are no clouds of operational significance, no TCU or CB; the abbreviations CAVOK and SKC are not appropriate."
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A few months back, my local airfield, 3NM to the west, was giving 'No Significant Cloud' on the ATIS. At this time, I sat, with a nice Chardonnay, watching the TS in the overhead. Down to cost at the end of the day. A great shame, as during the present period of inter-glacial climate change, we need the most accurate Wx obs we can get our hands on.
UK differences from ICAO Annex 3 (my PDF copy may not be the latest)
"The reporting of clouds in the METAR of operational significance will be introduced on 6 October 2005. From this date, the abbreviation NSC (no significant cloud) will be used if there are no clouds of operational significance, no TCU or CB; the abbreviations CAVOK and SKC are not appropriate."
"The reporting of clouds in the METAR of operational significance will be introduced on 6 October 2005. From this date, the abbreviation NSC (no significant cloud) will be used if there are no clouds of operational significance, no TCU or CB; the abbreviations CAVOK and SKC are not appropriate."
Only half a speed-brake
I seem to remember the same, however the class on that day had "New ICAO METAR standard 1998" listed on the schedule.
I did look up the CAVOK definition in Annex 3, and the 5000 limit is not there. No operational significance they say.
I did look up the CAVOK definition in Annex 3, and the 5000 limit is not there. No operational significance they say.
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Ummmm..............Chevvron and Floppy Link, what I have never understood is that if FEW, SCT, BKN and OVC are defined in terms of OKTAS, why, oh why, did we ever have to get rid of OKTAS and introduce another level of complexity???
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Anyway, I'm surprised EASA hasn't decimalised it again, for it was 'tenths' before oktas...
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types of ATS: Basic, Traffic, Decon, and Procedural.
