The key purpose of the telescopic boom is to bring the nozzle to a minimum distance from the aircraft, for maximum de-icing fluid efficiency, while keeping the de-icing truck, its cabin and boom at a maximum distance from the aircraft, for maximum safety. The telescopic boom is also designed to withstand the added load for the optional Forced Air system, where – as with any such system – minimum distance between air stream nozzle and aircraft is crucial for efficiency: Even at 2 metres distance, the air flow rate drops significantly, but the boom allows the distance to be retained at a minimum. Even when using Forced Air on quite large aircraft. If installed on the Beta-15, the nozzle can be elevated to a vertical height of over 23 metres.
