Can you tell the difference between an MEA, MOCA, and OROCA on an IFR Enroute Chart? Let's look at the Minimum Enroute Altitude, Minimum Obstruction Clearance Altitude, Minimum Crossing Altitude, and a few other IFR altitudes you'll need to know about when flying on an Instrument flight plan.

The IFR Enroute Chart lists most of these minimum altitudes, so this guide will work through how to read all of them, and what they mean to us for flight planning.

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0:00 Intro
0:39 Minimum Obstruction Clearance Altitude (MOCA)
1:55 Minimum Enroute Altitude (MEA)
2:43 Changeover Point
4:02 GPS MEA
5:17 Minimum Reception Altitude (MRA)
6:16 MEA Changes
7:53 Minimum Crossing Altitude (MCA)
9:08 Off Route Obstruction Clearance Altitude (OROCA)
10:31 Minimum Vectoring Altitude (MVA)
12:15 Maximum Authorized Altitude (MAA)