Before climbing into the aircraft fuels cell, the Tank Divers don personal protective equipment such as coveralls, head covers, gloves and air respirators to avoid harm from the chemicals they encounter.
"The process of opening a fuel tank is very dangerous and can present an explosive environment," said Williamson. "People don't really get to see much of what we do or where we go because when we open that tank up, we can't have anything that produces a spark or is not intrinsically safe [nearby]. Our hangar is set up to be 100% safe and fireproof."