Which rotary-wing attack tactic is delivered while the aircraft is at altitude and in descending forward flight?

The tactic referred to in the question is Diving Fire. This method involves the aircraft approaching the target at a higher altitude before descending while maintaining forward flight to deliver ordnance. The advantage of using this tactic lies in the ability to utilize gravity and inertia, which can enhance the accuracy and impact of the munitions on the target.

When executing a Diving Fire, the aircraft can maintain a safe distance from potential ground threats while still effectively engaging enemy forces. This tactic allows the crew to maximize their visibility and control of the battlefield during the attack. The angle of descent also helps in minimizing exposure to enemy air defenses compared to low-level flight, making it tactically advantageous in combat scenarios.

The other options, like Hovering Fire and Rolling Fire, involve different maneuvers that do not utilize the same altitude and forward flight characteristics as Diving Fire. Hovering Fire generally occurs when the aircraft is stationary, which would negate the altitude advantage and kinetic energy used in a diving approach. Rolling Fire is typically characterized by a strafe-like engagement, which is more effective in certain circumstances but does not involve the descending flight path as described in the question. Direct Fire generally refers to engaging a target without a specific tactical maneuver involving altitude and descent.