Andrew 'Bart' Simpson, 36, won gold at the 2008 Beijing Olympics and silver in last year's Games in London, both in the Star class.
Born in Chertsey, Surrey, he started sailing at the age of six with his father in Christchurch, Dorset, according to Tyler Sports Management.
Nicknamed Bart, he was awarded an MBE in the 2009 New Year Honours list.
A Foreign Office spokesman said it was aware of reports of the death of a British citizen and had contacted its counterparts in the United States.
More top news
The German bomb - a 500kg device - was spotted by a barge carrying out dredging works, the Royal Navy said.
The study found children born in the 1980s have found it much harder to build up wealth in housing and pensions as they age.
The singer ended speculation over who would perform by saying "the rumors are true" to her 63 million Twitter followers on Friday morning.