3 ms·
Guidelines established in AC 91-57. These set initial guidelines due to manned aircraft being restricted to 500 feet AGL. You aren't reliably telling 500 feet s
by lightedman 9y ago
Guidelines established in AC 91-57. These set initial guidelines due to manned aircraft being restricted to 500 feet AGL. You aren't reliably telling 500 feet straight up, so a good 100 feet of leeway/buffer zone is helpful. On top of that, AMA has a 3 mile (for airports)/400' safety recommendation.