SYDNEY :Australia said it will spend A$1.7 billion ($1.1 billion) on a fleet of "Ghost Shark" autonomous undersea vehicles, developed by its defence force and U.S. startup Anduril Industries, for surveillance and strikes. Defence Minister Richard Marles told reporters on Wednesday the Ghost Shark will complement Australia's navy surface fleet and submarines to provide "a more capable and more lethal navy". Dozens of Ghost Sharks will be built in Australia, with opportunities to export to allies,