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ATIS wind: VRB16. Allowed to land?

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ATIS wind: VRB16. Allowed to land?

Old 2nd May 2023, 17:30
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ATIS wind: VRB16. Allowed to land?

This came up in a recent discussion. Tower/ATIS reported a wind of VRB with 16 knots. Do your operators have explicit regulations in the OM-As / OM-Bs how "VRB" needs to be taken into account and whether you are allowed to land?

Best
J
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Old 2nd May 2023, 17:44
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No written guidance in the books. Need to use your own judgement.

However if your company is punitive then give it a whirl, go-around and divert. That would be my take.
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Old 2nd May 2023, 19:31
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Did this actually occur? Never heard of a variable wind report that strong.
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Old 2nd May 2023, 19:35
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I have had VRB20G30 in ACE. We elected not to continue the approach…
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Old 2nd May 2023, 23:10
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Discussed 5 years ago and I don't know if any of the definitions have changed -

https://aviation.stackexchange.com/q...-metar-reports

Unless I misunderstood the discussion VRB should only be used for light winds (less than 3 kts, 6 km/h).



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Old 3rd May 2023, 08:10
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Originally Posted by EXDAC
Discussed 5 years ago and I don't know if any of the definitions have changed -

https://aviation.stackexchange.com/q...-metar-reports

Unless I misunderstood the discussion VRB should only be used for light winds (less than 3 kts, 6 km/h).
ICAO Annex 3 - Meteorological Service for International Air Navigation - says as below. The limit you mention, exists in b)2) only. It seems to me that the case discussed in the thread - VRB16KT - was reported according to b)3).
.
4.1.5.2 In local routine reports, local special reports, METAR and SPECI:
a) the units of measurement used for the wind speed shall be indicated;
b) variations from the mean wind direction during the past 10 minutes shall be reported as follows, if the total variation is 60° or more:
1) when the total variation is 60° or more and less than 180° and the wind speed is 1.5 m/s (3 kt) or more, such directional variations shall be reported as the two extreme directions between which the surface wind has varied;
2) when the total variation is 60° or more and less than 180° and the wind speed is less than 1.5 m/s (3 kt), the wind direction shall be reported as variable with no mean wind direction; or
3) when the total variation is 180° or more, the wind direction shall be reported as variable with no mean wind direction;
c) variations from the mean wind speed (gusts) during the past 10 minutes shall be reported when the maximum wind speed exceeds the mean speed by:
1) 2.5 m/s (5 kt) or more in local routine and special reports when noise abatement procedures are applied in accordance with the PANS-ATM (Doc 4444); or
2) 5 m/s (10 kt) or more otherwise;
d) when a wind speed of less than 0.5 m/s (1 kt) is reported, it shall be indicated as calm;
e) when a wind speed of 50 m/s (100 kt) or more is reported, it shall be indicated to be more than 49 m/s (99 kt); and
f) when the 10-minute period includes a marked discontinuity in the wind direction and/or speed, only variations from the mean wind direction and mean wind speed occurring since the discontinuity shall be reported.
Originally Posted by Joe R
This came up in a recent discussion. Tower/ATIS reported a wind of VRB with 16 knots. Do your operators have explicit regulations in the OM-As / OM-Bs how "VRB" needs to be taken into account and whether you are allowed to land?
In my outfit there is no explicit regulations but generally such a wind is considered as tailwind. So landing is not allowed.
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Old 3rd May 2023, 08:17
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Surely a quick question asking if any tailwind component exists would be prudent.

Don’t overthink it.
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Old 3rd May 2023, 12:49
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Originally Posted by Rt Hon Jim Hacker MP
Did this actually occur? Never heard of a variable wind report that strong.
Isle of Man, 2017, "cleared to land, runway 08, wind variable at 35 knots....good luck!"
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Old 3rd May 2023, 17:57
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Had this recently. Mighty unhelpful from the meteorologists to report a wind like that, when in reality there's always a prevailing direction at such speeds. I chose to try an approach, turned out to be relatively stable crosswind in that case
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