You have HSIs in everything though, right? BCs are somewhat easier- put in the front course and go. I was told the sim training culls quite a few recruits so proficiency would get checked there or else the pilot goes away. On the latter subject, let us know if there are more rumors about people washing out of the 1900 versus the 120.
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As for as turnover and expansion, would appreciate any feeling for the numbers involved. I would tend to think there is quite a bit of turnover at GLA even during static periods, as GLA is not considered a career objective all that much.