I've been looking into DE as an Officer in the RNR and am getting more and more confused. So, I want to join the RNR through the DE route to become an officer. I am aware that I have to passed the AIB but this may not be for 18 months or so. Now during the 18 months before the AIB, would I be training as a Rating or is it just a matter of remaining an applicant undergoing no official training for the 18 months until you sit the AIB??