Something in the title may explain; the Joint Helicopter Command commands operational activity and the Directorate directs (as in deals with personnel, airworthiness, flight safety structures and organisational matters, training policy and a whole host of other things that the JHC would not even wish to go near). Apart from fighting PS10 about flying pay, it does a remarkably good job given the circumstances. (Oh and I wasn't paid to say that; I know how hard some of those people work for the Corps).