Instrument Stage 1: 1. Obstruction clearance-1000 feet normal area, 2000 ft in mountain area
2. Guarantee nav radio reception-usually use to identify the waypoint

Question

1. Obstruction clearance-1000 feet normal area, 2000 ft in mountain area
2. Guarantee nav radio reception-usually use to identify the waypoint

Adam Busch · Accepted Answer

IFR Altitude Low IFR Enroute chart(updated every 56 days, each chart has its own scale) MRA-Minimum reception altitude

1. Obstruction clearance-1000 feet normal area, 2000 ft in mountain area 2. Guarantee nav radio reception-usually use to identify the waypoint