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Im just punching my way through the MET E-text and have taken issue with Q.17 in the first revision exam. I perceive all the answers to be wrong.
Text within the GAF user guide states :
"Validity times are consistent for all GAFs nationally. The standard validity times are 2300Z0500Z, 0500Z-1100Z, 1100Z-1700Z and 1700Z-2300Z. Two GAFs will be issued every 6
hours and have a validity of 6 hours each, (one +00 to +06hr GAF and one +06 to +12hr GAF)
thus providing a forecast for a 12 hour period."
Can someone back me up, ensuring i've learnt the right thing?