MOCAs on Tango routes & GPS MEAs higher than MOCA
Asked by: Gibson M 7834 views FAA Regulations, Instrument Rating
I recently noticed a Tango route (GPS route) that is NOT to/from a VOR has both a MOCA and a (higher) GPS MEA. Any ideas on how/why this is possible?
Examples: T302 & T304 10 & 22 NM N of DSD, going NW.
The MOCA is to provide obstacle clearance and signal coverage within 22 NM of the station. When using GPS, you don't need a signal from the station.
Being a more traditional RNAV system (triangulating multiple ground stations) seems like they'd need a higher altitude than a GPS receiver.
& similar thought, I've seen a number of GPS MEAs that are accompanied by a lower MOCA well clear of the 22 NM signal coverage limit. Why?
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