What is one reason to avoid flying low over open fields?

Flying low over open fields increases vulnerability to enemy fire due to the larger exposure and lack of cover. When an aircraft operates at low altitudes, it is more easily targeted by adversaries who can see and track the aircraft more readily. Open fields provide little to no structural cover or obstacles that might otherwise help conceal the aircraft, making it an easier mark for ground-based defenses.

Additionally, low flying presents a predictable flight path, as open landscapes typically lack varied terrain features to obscure or minimize visibility, resulting in a higher risk of being engaged by enemy fire. In such situations, operational techniques would favor terrain masking, utilizing varied elevation and natural obstacles to avoid detection and minimize risk. Thus, the primary concern while flying low over open fields is the increased likelihood of enemy engagement.