A US military aircraft that crashed off the Australian coast has been found. <br/><br/>Authorities said today that divers are preparing to try and locate three missing marines. The MV-22 Osprey – a hybrid helicopter-turboprop with a chequered safety record – went down today off Shoalwater Bay in Queensland state. <br/><br/>Twenty-three personnel were quickly saved, but three marines remained missing despite an air and sea search. <br/><br/>The Royal Australian Navy survey ship HMAS Melville joined the search and soon found the wreckage.<br/><br/>