Just to nail this one and put it to bed...Roland and Camelspyder...I concur (ooh dejavu)
I'm not suggesting (and I don't think anybody else is either) that any outfit can cough up spare bodies...nobody has spare bodies these days.
I'm suggesting that sooner rather than later, the RN will be the only outfit in our military system capable of producing acoustics operators...in fact that may be the case already.