Below what altitude should an aircraft be on glide path for a stabilized approach?

For a stabilized approach, the appropriate altitude to ideally be on the glide path is typically around 1,500 feet MSL. This altitude allows pilots adequate time to make any necessary adjustments to ensure that the approach remains stable right through to the landing phase. At 1,500 feet, pilots are generally below the traffic pattern altitude and have transitioned from any initial descent to align with the final approach segment.

The choice of 1,500 feet MSL is in line with commonly accepted aviation practices which state that being on profile at this altitude contributes to safety and efficiency in landing. While the other options may represent various altitudes potentially relevant during different phases of flight, 1,500 feet is specifically recognized within the context of a stabilized approach as the appropriate altitude to confirm that the aircraft is correctly configured and on the proper glide slope leading to landing.

Staying on glide path at this level helps ensure that pilots have sufficient time to respond to any issues and maintain an appropriate approach speed, configuration, and descent rate.