Sennen Cove's Rother class lifeboat Diana White tows Koo-She and her four-man crew to safety.

The size of the sea can be gauged from the yacht - a sizeable 44ft ketch - as can the difficulty of towing a casualty without steering (inset) as Koo- She takes a sheer on a large wave and slackens the tow.

(Photos lifeboat crew member Phil Shannon).