What was unique about the guns in the plane Dahl was flying?

The guns in the plane that Roald Dahl was flying were unique in that they were immobile, meaning they could not be repositioned independently but rather relied on the movement and direction of the aircraft to be aimed at targets. This design necessitated a specific coordination between the pilot's flying maneuvers and the use of the guns, which added a layer of challenge to aerial combat. The static positioning of the guns meant that the pilot had to effectively manage both flying the plane and targeting simultaneously, as the guns were fixed and not automatically guided or capable of rapid firing on their own.

Other options suggest characteristics that do not align with the actual functionality described in Dahl’s experiences. The idea of automated guns would imply a level of technology and sophistication that was not present during the period he was flying. High rates of fire and short bursts do not address the inherent limitations imposed by immobility in aiming the guns effectively. Thus, the correct understanding revolves around the significant challenge presented by their static nature, requiring skillful piloting to aim accurately during combat.