Sadly, ships are about the only means of achieving long-range SAR within the UK SAR Region these days. All ocean going ships are required to render assistance under SOLAS (Safety of life at Sea Convention 1974) and the International Convention on Maritme SAR. This of course depends on a ship happening to be in the right area at the right time. Now the bad news - very few ships have any means of launching a rescue craft or have hatches near the waterline. The 'S' in SAR might be very loosely covered but the 'R' is extremely unlikely
KMAGYOYO (Kiss my ass George, you're on your own!!)