“Strong winds will create dangerous sea conditions which could capsize or damage small and large vessels,” the weather service said.

It inspected eight vessels, although not including any operated by Dive Pro Liveaboard, and found none had "a planned maintenance system, safety management system or stability books", a crucial document for avoiding capsize.

At one point, a few hours before the capsizing, a small inflatable boat slipped off the back of the Sea Story.

The limb was found in the 800 block of Paseo Del Mar, the same spot where a capsized boat belonging to two fishermen washed up earlier this week.

At least 69 people, including 25 Malians, have died after a boat bound for Spain from West Africa capsized off Morocco, Mali's authorities have confirmed.