During an ASR approach with a Cat C jet, what is the required ceiling and visibility to start the approach?

During an ASR (Airport Surveillance Radar) approach, the minimum requirements for visibility and ceiling depend on the category of the aircraft and the specific approach procedure being used. For Category C aircraft, which includes certain turbojet aircraft, the minimum visibility requirement is typically set at 1 statute mile, and the required ceiling for initiating the approach is at least 600 feet above ground level.

This requirement ensures that pilots have adequate visual reference to navigate the aircraft safely during the approach phase. Starting an approach without meeting these requirements could jeopardize the safety of the flight, as pilots need sufficient visibility and altitude information to effectively manage the descent and landing process.

Therefore, the requirement of 600 feet and 1 statute mile for a Category C jet during an ASR approach is established to ensure safe operation within the parameters of the approach procedure.