AGL Transponder VOR 
Pilot Institute
APRIL 24, 2024
All aircraft inside the veil must have an operating Mode C transponder and ADS-B Out. A Mode-C transponder (automatic altitude reporting capability) inside the Mode C Veil. If flying under IFR, you’ll need a VOR or TACAN receiver, or an RNAV system (GPS). However, you will need an operating Mode C transponder and ADS-B Out.
Flight Training Central
APRIL 29, 2024
MTR’s with segments above 1,500′ AGL are identified by a three-digit number. MTR’s flown entirely below 1,500′ AGL are identified by a four-digit number. Before entering the airspace, you must file and activate a flight plan and contact ATC for a transponder code. VFR pilots must file a D.C.
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