A Marine shops in the Mobile Tactical Field Exchange. This 9 foot vehicle has two doors with detachable stairs, a rear motorized lading dock and runs on 12 kilowatts of electricity. The interior walls are lined with shelved baskets, three reach in coolers, cash register and heating and cooling air conditioning system. Cpl. Tyler Duffner, clubs assistant manager at Marine Barracks 8th and I mans the register. - A Marine shops in the Mobile Tactical Field Exchange. This 9 foot vehicle has two doors with detachable stairs, a rear motorized lading dock and runs on 12 kilowatts of electricity. The interior walls are lined with shelved baskets, three reach in coolers, cash register and heating and cooling air conditioning system. Cpl. Tyler Duffner, clubs assistant manager at Marine Barracks 8th and I mans the register.