The IMR crews hand on the button to PTS crews as soon as the judge switches on the traffic lights. One lap for each crew. Each crew passes one lap of the track. To fulfill the engineer task the PTA crews approach the vehicle loading (unloading) ground. The personnel have to load a vehicle on to the amphibious carrier, have it fixed, perform a manoeuver within established boundaries, then return to the vehicle loading (unloading) ground, unload the vehicle and finally move on towards the finish line.