tacr2man
it is not a case of the sea king being marginal sse in the hover, at anything over 3000lbs of fuel and less than 15kts of wind in a 50ft hover over water it is not sse in the hover.
you can go higher and try to get a "fly away" situation, and overland, depending on a number of factors, you can mostly manage to be flyaway. However, that is the aircraft in a "fly away" position, not necessarily anyone on the end of the wire in a "fly away" position!
Coming back to the point, the problem is not the winching when not sse, it is legislation, adequate training for what you want to do, an acceptance of a degree of risk in such operations... oh, and don't forget someone fronting up the cash to make it all happen.