What is the requirement for flight visibility if a helicopter operates below 600 feet AGL under Special VFR conditions?

When a helicopter operates below 600 feet AGL (Above Ground Level) under Special VFR (Visual Flight Rules) conditions, there is a specific requirement for flight visibility that must be met to ensure safe operations. The requirement is that flight visibility must be not less than 1500 meters. This visibility standard is established to provide pilots with adequate visual references for navigation and obstacle avoidance in controlled airspace, particularly in conditions where standard VFR weather minimums are not met.

The requirement for 1500 meters of visibility allows for sufficient distance to see and avoid other aircraft, as well as to recognize and respond to potential hazards. This is especially critical at lower altitudes, where the risk of encountering obstacles increases.

In contrast, other visibility limits for helicopter operations under Special VFR are not appropriate for the specified altitude. While greater visibility might be mandated for other flight operations or under different conditions, 1500 meters strikes a balance between safety and operational flexibility for helicopters operating under Special VFR at low altitudes.