What is a primary reason for the limited number of ranges supporting multi-helicopter gunnery training?

The primary reason for the limited number of ranges supporting multi-helicopter gunnery training is related to the Surface Danger Zone (SDZ). The SDZ is a critical safety concept in military operations that defines the area in which hazards exist during live-fire exercises. In the context of multi-helicopter gunnery training, the SDZ must be large enough to account for the multiple aircraft engaging targets simultaneously and the potential for errant rounds. This requirement significantly constrains the locations where such training can be conducted.

Establishing an adequate SDZ involves careful consideration of factors such as the type of ammunition being used, the range of fire, and the flight paths of the helicopters. These considerations can limit the number of suitable training ranges, as they must be specifically designed to accommodate the complexities and safety concerns associated with multiple aircraft operating in close proximity.

In contrast, personnel costs, equipment limitations, and weather constraints can influence training operations but do not fundamentally restrict the number of ranges available for multi-helicopter gunnery training to the same extent as the safety requirements posed by the SDZ.