Crab, out of interest, how do you, as a SAR pilot, descend from IMC into a situation at an ad-hoc location?
While Crab is busy, here's a quick reply: IMC offshore descents are done using the very fine radar to avoid obstacles. Overland, there is no way down from IMC except using an airfield approach aid = maintain COCISS all the way there. Not many lakes or reservoirs in this country are a suitable size and shape to conduct a radar letdown; many years ago I witnessed a RadOp attempting a practice radar letdown over Loch Morlich in VMC which would have gone spectacularly wrong had the aircraft been IMC...