Chart Smart: low altitude IFR enroute chart intersection symbol
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What does the flag with the letter R indicate at the BOOPS intersection on the V333 airway?
The letter R located within the flag at the BOOPS intersection on the V333 airway indicates a Minimum Reception Altitude (MRA) of 4,500 which is the lowest altitude at the intersection where BOOPS can be identified using the VXV VOR (116.4).
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