Ookpik Aviation in Baker Lake, Nunavut, is getting ready to spend a second day searching for two missing Americans.

The airline spent six hours in the air yesterday searching for a father and son who were fishing at Dubawnt Lake, which is about 250 kilometres southwest of Baker Lake.

On Monday, the two men failed to meet a charter flight that had been scheduled to take them out. Instead, the charter found a boat that was out of gas, and no sign of the men.

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The father and son were fishing at Dubawnt Lake, which is about 250 kilometres southwest of Baker Lake, Nunavut. (Google)

Paul Kotelewetz, the airline's general manager and co-owner, said his airline is using a specially equipped Turbo Otter on wheels, or what they call ‘tundra tires’.

"Our aircraft is capable of landing in three or four areas around Dubawnt Lake, so we thought perhaps if we found them we'd want to pull them out, but unfortunately that wasn't the case," he said.

Kotelewetz said the aircraft circled the boat and saw no sign of the men. They also searched many miles of shoreline.

Ookpik Aviation flies small planes for mineral exploration and eco-tourism in the area. Kotelewetz said they don't know who dropped the men off, or whether they were connected with any nearby hunting or tourist lodges.

Right now, Ookpik Aviation is gathering local spotters to head out for their second search of the area. 

The Canadian military was involved in the search on Tuesday but now it is in the hands of the RCMP and the government of Nunavut.