If the herc det was manned by thechies from kinloss (heaven forbid) then they would be expected to do at least the comp course, and then come back for a refresher before they go. Of course there will have to be SNCO's and JNCO's who hold the relevant trade Q's and up to date auth's due to the nature of the job. I think the majority of people rotating out to 1312, on the herc side, are now being plucked from lyneham rather than the four corners of the RAF.