Some NZ answer
Not sure when those brevets started but.. the AEOP one ceased on the 1st July 07 when the trade was merged with the Nav trade. The new brevet is the AW brevet for Air Warfare and then you have AWS - Air Warfare Specialist for NCOs (replacing AEOPs) and AWO - Air warfare Officer which replaced the Nav and AEO. NZ aircrew are still allowed to wear the AE brevet until they convert onto the upgraded Herc or P3