Two kayakers had to be rescued after getting into difficulty off the Vale of Glamorgan coast.
RNLI volunteers from Penarth Lifeboat Station were called out to the pair at Lavernock Point at about 16:30 GMT.
They had been in the water for about 40 minutes and called for help using a VHF radio they had with them.
Rescuers carried out first aid and one of the kayakers was taken to hospital by ambulance.
HM Coastguard officers from Penarth and South Wales Police were also involved in the rescue.
Jason Dunlop, lifeboat operations manager for Penarth RNLI Station, said: "There is no doubt that the kayakers were saved by having good equipment with them, including that all important VHF radio.
"We would encourage all kayakers to ensure they are suitably equipped when out on the water."