Britain's sailing team finished the world championships as the top-performing nation with two gold medals, a silver and two bronzes in Cadiz.
McMillan and Bulkeley capped a fine week for Britain
Tornado catamaran crew Leigh McMillan and Mark Bulkeley clinched silver on the final day to add to an already impressive haul.
McMillan and Bulkeley trailed behind Australians
Darren Bundock and John Forbes with Argentina's Santiago Lange and Carlos Espinola in third.
"I'm delighted, if someone had told me at the beginning of the week that we would finish second I would have probably told them that a top five would be okay," said McMillan.
On Tuesday, Finn sailor Ben Ainslie, the double Olympic medallist, and the 49er pairing of Chris Draper and Simon Hiscocks were crowned world champions.
Olympic Finn champion and former Star world title holder Iain Percy earlier won bronze in the Star class with crew Steve Mitchell.
And Ainslie's training partner Andrew Simpson also collected a bronze medal in the Finn.
Australia were joint second with France in the medal table with one gold, one silver and a bronze.
Victory in Cadiz ensured Ainslie of a place in the British Olympic squad for Athens
next year, where he will attempt to win his third Olympic medal.
Percy was also assured of an Olympic berth alongside Sydney gold medallist Shirley Robertson and crew Sarah Ayton and Sarah Webb, who came seventh in the Yngling class.
Draper and Hiscocks will race the 49er in Athens, while Nick Dempsey achieved the selection criteria in the men's windsurfing class.
Britian's other Athens-bound sailors include 470 pair Nick Rogers and Joe Glanfield and McMillan and Bulkeley.