Milford Haven Coastguard says an operation is underway to rescue a Portuguese seaman with serious head injuries in rough seas off the coast of Pembrokeshire.
Warship HMS Echo, which was passing nearby, is trying to provide shelter to calm the water so that the injured man can be winched to safety.
A rescue helicopter from RAF Chivenor and Angle Lifeboat are also involved in the rescue around 18 miles west of St Ann's Head.
More top news
A disabled basketball player from Holyhead says he needs a specialist wheelchair to fulfil his dream of competing in the 2020 Paralympics.
Rain in the east will clear through this evening leaving much of the night drier with clearer spells.
Emergency services are being put through their paces in a two-day anti-terror exercise.