I hope someone will be kind enough to answer some questions I have provided of course I am not asking something I shouldn't be.... Just out of interest what is meant by the roles of OA & TI when referring to CPOs' in the WE branch. I take it WEM(O) & WEM(R) are now combined? When referring to fore-endies and back afties, to a civvi am I correct in assuming that these are ME branch or former MEM(M) & MEM(L) (+ MEA) designated to maintain particular equipment forward & aft? When at diving stations, from what I gather the fwd planes are worked by the supply branch, who controls the aft planes, who controls the vents and the trim. In fact without sounding ignorant how many people are involved in diving / surfacing a boat and if possible who does what. When surfaced who normally undertakes bridge watchkeeping along with the OOW? Thanks to all in anticipation, I hope I haven't asked something that I shouldn't have and apologies if I have!