Upon arrival in Dartmouth, Nova Scotia, Robertson finds out that this is going to be an excruciating day: working with one the most elite units within the Canadian Navy. This unit (called the “fleet diving unit”) uses their skills to protect, maintain and repair the navy’s ocean vessels from threats including underwater mines, damage from collisions and fires. He begins his day with a jog that would exhaust an experienced runner. Then a 45-minute swim in a heavy, restrictive wetsuit pushes Robertson to the brink. Will he sink or swim?
In the afternoon, he is suited up and sent into the dunk tank for underwater problem-solving training. As his body reacts to the increased pressure underwater, his mind has to remain focused. A small mistake here could be dangerous in a reallife situation. Back on dry land and in the fire simulator, Robertson fights a real blaze inside of a mock-up of a battle ship.