Buoy 15,
Empowered Master are employed on the Kipper fleet, they were first thought of from the Airmen Aircrew Sustainability Study and were put in place with the Disbanding of 206 and the Sqn restructuring. Hence the posts of WSOp Ldr (EW), WSOp Ldr (ACO) and the Air Eng's had one in place from just before the restructuring, but in all Sqns now. All have the proper PICs associated with them, so a proper established post. The Sqn WO can be any of the Sqn's MACR and is not an established post as such. So maybe your just slightly confused about the term Empowered Masters.
Hope this clears things up.