I had a bit of experience with SAR during my commercial fishing
days but they were all fairly mundane with no drama attached. My weirdest case of offering assistance at sea was being hailed by a passing yacht while we were fishing
30 miles off the west coast
of NZ. The yacht in question had sailed from Australia
and expected to make landfall at Nelson but their satnav had gone down and weren't sure of their position and were worried they had gone too far. They could see land and their question was "is that the west coast
or the east coast
?" It was late afternoon and the sun was shining beautifully on the Southern Alps so I asked them if the sun rose & set in different places in Oz. They soon got the message. Their DR since the satnav hd gone down was actually very good and they didn't have to alter course much to make their expected landfall.