By the incoming spring tide, and is in danger of being submerged and swept out to sea. And on the most southerly point of the Sussex coast, in Selsey, the crew race to the rescue of a local diver with a suspected case of 'the bends'.By the incoming spring tide, and is in danger of being submerged and swept out to sea. And on the most southerly point of the Sussex coast, in Selsey, the crew race to the rescue of a local diver with a suspected case of 'the bends'.