Complex sentence: In 1960 he became director of public relations for the Royal Australian Navy, and handled the media and public affairs issues arising from Australia's biggest peacetime naval disaster in 1964 (the sinking of HMAS "Voyager", with the loss of 82 lives).
Split into simpler sentences: In 1960 he became director of public relations for the Royal Australian Navy. In his position with the Navy, he handled the media and public affairs issues arising from Australia's worst peacetime naval disaster in 1964 (the sinking of HMAS "Voyager", with the loss of 82 lives).