What primary function does a lavatory truck perform?

The primary function of a lavatory truck is to empty the lavatories on board aircraft. This specialized vehicle is equipped with systems designed to safely and efficiently remove waste from the aircraft's restroom facilities. Regular servicing of the lavatories is essential for maintaining hygiene and overall passenger comfort during flights, making the lavatory truck a vital part of ground support operations.

While other functions like loading food and drinks, supplying power to the aircraft, and moving luggage are all important aspects of airport operations, they are not the primary purpose of a lavatory truck. A food truck is designated for catering services, ground power units are utilized for supplying electrical power to parked aircraft, and baggage carts or vehicles specifically handle luggage transportation. This specialization ensures that each type of ground support vehicle can effectively perform its intended role in the overall operation of airport services.