Final answer:
In a situation requiring a cold refuel of an aircraft, the fuel servicing equipment is typically located outside the shelter to ensure safety and ventilation.
Step-by-step explanation:
In a contingency or wartime situation that requires a cold refuel operation when aircraft engines are not running, the fuel servicing equipment is typically located outside the shelter. This ensures that the fueling process can be conducted safely without the risk of fumes accumulating in an enclosed space. Cold refueling is a process where an aircraft is refueled without the engines running, which is a standard safety protocol to reduce the risk of fire or explosion due to the presence of fuel vapors. The fuel trucks or portable fueling equipment are positioned close to the aircraft, but outside any shelters or hangars to maintain ventilation and access for emergency egress if needed.