By Kirsty Needham PERTH (Reuters) -In the control room of the American Virginia class attack submarine USS Minnesota, off the Western Australian coast, sonar operators adjust to the chatter of dolphins in new waters where the U.

Beneath the waters off the Western Australian coast, sonar operators aboard a U.S. Navy Virginia-class submarine are adjusting to a new environment. The quiet hum of advanced sonar systems is accompanied by the chatter of dolphins as the submarine navigates unfamiliar territory.