Some of the replacement Grumman Tracker anti-submarine aircraft arriving at Banketown Airport after a flight from HMAS Melbourne, off the coast.The US supplied Australia with 16 Trackers at a total cost of $7 million. Some will replace those lost in the N

Some of the replacement Grumman Tracker anti-submarine aircraft arriving at Banketown Airport after a flight from HMAS Melbourne, off the coast.The US supplied Australia with 16 Trackers at a total cost of $7 million. Some will replace those lost in the Nowra fire late last year. April 5, 1977. (Photo by John Patrick O'Gready/Fairfax Media via Getty Images).