This is not meant as an inter-service dig but the RN SAR force is totally coherent with the front line reqt. RN SAR crews are front line crews from the SK/Mer/Lynx world on a respite tour. The skillsets are directly transferrable and embarked crews are at notice for SAR wherever they are in the world - and have been used on an all too regular basis.
Regrettably (and this is not a dig) the RAF SAR Force is a stand alone organisation with no war/front line role. With the exception of a loss of
PR civilianisation of this Force would make little difference to MOD.