High Level Sigwx Charts
Hiii All
Before Your Flight You Receive Sigwx Chart
Example
World Area Forecast Center
London
Fixed Time Forecast Chart
Fl250-fl630
Valid 00 Utc On 23.feb.2011
Is It Means Valid Until 00 Utc Or Valid From 00 Utc Until The Next Fixed Time ?
Actually Am Confused , I Had Alot Of Discussions About It And Each One Says To Me Different Answer ,so Please If Anyone Have An Answer From A Book And Can Clarify This Subject