Some testing of the Concorde's sonic boom over land was done in Australia in 1972. After it entered service, visits by Air France and British Airways were confined to luxury air cruises. Landings and takeoffs at noise-sensitive Sydney airport was always over Botany Bay. The long legs of subsonic wide-bodies had nullified much of the Concorde's speed advantage. When launched, Concorde would have been 12-15 hours quicker London-Sydney than a typical 707 service. But against a 1980s one-stop 747 service the saving was only four hours.