AGL Altimeter Instrument Flight Rules 
Pilot Institute
MAY 25, 2024
JFK 09/317 JFK TWY WA BTN TWY A AND TWY B CLSD 2309191827-PERM FDC NOTAM Flight Data Center (FDC) NOTAMs outline changes affecting instrument flight rules (IFR) operations. These include changes made to instrument approaches, STARs, SIDs, and IFR airways.
Pilot Institute
APRIL 24, 2024
Class B airspace is also charted on VFR Sectionals and instrument flight rules (IFR) Enroute Low Altitude charts. Stay clear of the Class B boundaries if you’re flying under a shelf with a floor less than 3,000 feet AGL. You don’t want an incorrect altimeter setting to cause an airspace incursion.
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