Which of the following is NOT a requirement for a landing zone (LZ)?

A landing zone (LZ) for helicopter operations needs to meet specific safety and operational criteria. Among the requirements, fire protection is crucial to ensure the safety of both the aircraft and personnel involved, as any potential fire hazards can pose significant risks during landing and takeoff.

The designated area must also be large enough, specifically 36 feet by 36 feet, to accommodate the helicopter without encroaching upon surrounding hazards or obstacles. This space requirement helps ensure a safe landing and takeoff environment.

Flat terrain with no obstacles is another essential requirement for an effective LZ. This characteristic minimizes the risk of accidents during landing and ensures that the helicopter can safely navigate the area without interference from terrain irregularities or obstructions.

In contrast, proximity to a body of water is not a necessary requirement for an LZ. While being near water can be advantageous for rescue operations, particularly in surface water rescue scenarios, it does not influence the core criteria for a safe and operational landing zone. Thus, it is the factor that does not align with the critical requirements for LZ designation.