The coastline around those parts is very difficult in places and the weather unpredictable/changeable etc.
In August 1941 an aircraft crashed off the beach at Rhosneiger and the three crew got out. During the rescue, the three crew died as did ELEVEN resuers. Two boys aged 17 were each awarded the George Medal (one went on to be a brigadier) - that's how dangerous it gets and that's why the crew had to be taken off. Well done the helio boys/gals involved.
Old Duffer