I believe that the qualifiying period for an Op. Telic medal was 30 days continuous service and 10 trips/sorties for aircrew (this excludes the clasp qualifications which are seperate). The qualifying period for Op Herrick medal is 30 days continuous service and 30 trips/sorties for aircrew. (Again excluding the clasp qualifications). Can anyone tell me if I am correct with my assumptions re the qualifying periods for each Op.? If so why is there a difference for aircrew from Telic to Herrick?