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Expedition team says prototype of the Avro Arrow found at bottom of Lake Ontario

Last Updated Sep 8, 2017 at 12:35 pm EDT

An autonomous underwater vehicle is launched in Lake Ontario in Prince Edward County on July 28, 2017. The vehicle is being used to search to search for Avro Arrow airplane models missing since the 1950s. HANDOUT/Raisethearrow.com

Search crews say they have found a test model of the Avro Arrow, an advanced Canadian fighter jet that was controversially scrapped in 1959, on the floor of Lake Ontario.

OEX Recovery Group, which is spearheading the Raise the Arrow expedition, says in a news release Thursday that new sonar imagery confirmed the discovery of an Avro Arrow free-flight model.

The company is promising that photos and video footage of the discovery will be revealed publicly Friday in Toronto.

The mission to find nine models of the Avro Arrow began in late July near Point Petre, Ont., with a submarine scouring the waters of Lake Ontario.

The expedition also is meant to coincide with next year’s 60th anniversary of Avro Arrow’s first test flight.

The models were first launched from a military base in the 1950s as part of the development of the Avro Arrow, the first and only supersonic interceptor built by the Canadian military to counter potential Soviet bomber attacks in North America’s Arctic.