What altitude should be set for autopilot operations in non-precision approaches?

In non-precision approaches, the appropriate altitude to set for autopilot operations is critical for ensuring safer landings. Setting the autopilot to 400 feet above ground level (AGL) allows the crew to have a stabilized approach while providing enough altitude to react to unforeseen circumstances during the critical phases of landing. At this altitude, pilots can effectively manage aircraft control, transition to visual reference for landing, and execute any necessary go-arounds if required.

400 feet AGL is considered an optimal altitude for maintaining safety margins, as it gives the pilots sufficient time to assess the approach and respond if the conditions are not favorable for landing. This practice aligns with the operational procedures necessary for safe, efficient flying in accordance with regulations often outlined in Part 135 operations, which govern various aspects of commercial aviation.

The other choices do not offer the same level of safety for non-precision approaches due to the lower altitude, which could restrict the pilots’ ability to assess the runway environment effectively and execute necessary corrections before touchdown.