nav attacking, all true.
By and large aircrew, once on a type and esconced in a squadron, can expect to remain for a number of years compared with ground branch officers that move frequently. Airmen do move less frequently and I know steward who was promoted from sgt to WO but never left the Officers' Mess - he may even have been there as a JNCO.
Where the theory of aircrew stability falls down is towards the end of a particular types service live - the F3 move to Leuchars for instance or the closure of a base such as St Mawgan or Lyneham.