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General => The Classroom (Controller Tips) => Topic started by: Bernardo Elayda on June 07, 2020, 08:31:11 PM

Title: Question about a 'calm' wind definition
Post by: Bernardo Elayda on June 07, 2020, 08:31:11 PM

Hi,
There was a question in the S1 test that I was marked as incorrect.
The question was what windspeed is considered calm.  Based on TAF definition from NOAA( https://aviationweather.gov/static/help/taf-decode.php), I said a windspeed of 3knots or less.  This was marked wrong.

Is my understanding correct and the answer to this question should not have been marked wrong?
tia,be

Title: Re: Question about a 'calm' wind definition
Post by: Emanuel Thompson on June 07, 2020, 08:35:29 PM

Hi Bernardo,

So in the 7110.65Y. It states,

2-6-5 CALM WIND CONDITIONS
Describe the wind as calm when the wind velocity is less than three knots.

https://tfmlearning.faa.gov/publications/atpubs/ATC/atc0206.html#26J370JACK

Title: Re: Question about a 'calm' wind definition
Post by: Clay Brock on June 08, 2020, 10:03:15 PM

That link references the 7110.65T from 2010. Luckily enough the information remains basically unchanged:

2−6−3. REPORTING WEATHER CONDITIONS
b. Describe the wind as calm when the wind
velocity is less than three knots.

You answered 3 knots or less.