More important, why can the fixed wing DH not now be 100ft since instrumentation and performance of modern ac is so much better. I would have been quite happy to fly to 100ft DH in the F3 on a HUD approach if the PAR/ILS was cleared. Maybe Master Greens should be allowed to use a 100ft DH?
I'm sure we all remember when the Y1/Y2 was got rid of by the RAF and then re-intoduced due to popular demand. I believe that it gives a simple indication of when the weather if fit for Green Cards or White Cards. When you are busy in a single seater conducting a mission it is a simple, unambiguous way of receiving the weather.
Last edited by Dominator2; 10th Feb 2013 at 10:18.