Which type of helicopter operation is least hazardous?

Scene lighting at night is considered the least hazardous type of helicopter operation due to the nature of the task involved. This operation typically involves a helicopter hovering or flying at a relatively low altitude to illuminate a scene without the need for complex maneuvers or interactions with individuals on the ground.

The risk factors associated with scene lighting operations are generally lower than those involved in other types of operations. For instance, hoisting requires precise coordination and could pose risks for both the helicopter crew and the individuals being hoisted. Air rescue operations can be high-pressure scenarios that involve navigating into potentially hazardous environments, which can be complicated, especially if victims are in challenging or dangerous locations. Transporting victims can involve additional risks due to the need for securing and safely managing individuals who may be injured or unstable.

In contrast, while operating a helicopter for scene lighting, pilots can maintain a stable position above the area, often with clear visibility and less interaction with people or objects that could interfere with flight safety. This simplicity and controlled environment make scene lighting at night the least hazardous option among the choices provided.