Now 350 miles off the Californian coast, the yacht is beyond the range of a shore-based helicopter so a US Coastguard cutter with a helipad has been dispatched to rendezvous to carry out a two-part airlift if necessary. They are expected to reach the yacht at 1530 GMT (0830 local time).
A rescue operation to help four injured sailors who are on the Clipper Round the World Yacht Race has been delayed because of bad weather. Three of the sailors are British including Jane Hitchens from Kent, who has four suspected broken ribs.
Their vessel the Geralton was struck by a large wave 400 miles off California on Saturday.