What distinguishes a low approach from a restricted low approach?

The distinction between a low approach and a restricted low approach primarily revolves around the altitude limits and operational permissions. In a restricted low approach, the requirement to not descend below 500 feet above ground level (AGL) is crucial. This limitation is instituted to enhance safety and situational awareness, both for the pilot operating the aircraft and for any activities occurring on the ground at lower altitudes.

While a low approach may allow for landing on the runway, a restricted low approach explicitly sets altitude restrictions that prevent pilots from descending below a specified level, thus maintaining a safety buffer above potential obstacles or other air traffic. This reinforces the focus on adhering to safe operational practices when executing an approach.

The other options either suggest incorrect operational protocols or misinterpret the nature of approaches in standard flight procedures, making them less accurate compared to the role of altitude restrictions defined in the correct answer. Understanding these operational differences is essential for ensuring adherence to aviation regulations and safety practices.