Navy = AWI circa Scimitar/Buccaneer days
RAF = P(ilot)AI circa Hunter Days
RAF Buccaneer Force early 70s were first to create a crew WI cse and entitled it Buccaneer Attack Instructor (BAI). Eventually this evolved into QWI, which rest of FJ force followed. Hence: QWI(B); QWI(P); QWI(T); QWI(J) etc etc!
Where we lead the rest will follow!
Bloggs!