San Francisco Fire Department spokeswoman Mindy Talmadge confirmed to Press Association Sport that Andrew 'Bart' Simpson was taken to St Francis Yacht Club on the shore where paramedics performed emergency resuscitation, but he was pronounced dead.
She said another sailor suffered minor injuries.
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The MK912 spitfire was forced to make an emergency landing soon after taking off.
Showers ease in the north tonight, with it becoming very warm in the southeast tomorrow.
A mass inhalation of "hippy crack" was carried out in the shadow of Parliament on Saturday in protest at the Government's drug policy.