Abstract: A test facility where geographic location, orientation, elevation, distance, attitude and altitude are known for every point provides a user with a way to test the accuracy and sensitivity of navigation or positioning equipment. The facility is formed by elevating a test track on a series of piers. The test track may curve, tilt, or spiral under itself. Further, the test track may proceed in known directions to allow easy verification of test vehicle parameters. In operation, a test vehicle moves around the test facility. On board the test vehicle, navigation or positioning equipment measures the parameters of the test vehicle. These measured parameters are then compared with known parameters. This allows a user to test the claimed accuracy or sensitivity of the equipment used.