Bomb vault? Pretty small bombs. The hangar doesn't look very abandoned.
The airfield is on Google Earth on the south eastern edge of the town. The hangar on the link appears to be near short runway and off Quantas drive. The picture appears to be shot from the western side.
What would appear to be Secret would not be the airfield but that it was used by the US. It is a fair way in land but only 1000 miles from Borneo and outlying islands. It would have been a relatively secure base had the Japanese invaded.
Last edited by Pontius Navigator; 31st Dec 2012 at 19:39.