Altimeter Instrument Flight Rules Visual Flight Rules 
Northstar VFR
AUGUST 25, 2024
The list of inspections gets longer if the aircraft is for compensation/for hire, or if flown under instrument flight rules (IFR). There are a few exceptions when the aircraft can be flown outside of this timeframe, such as when a special flight permit is issued. There are also required inspections for civil aircraft.
Pilot Institute
APRIL 24, 2024
They try to make the underlying airspace easily navigable by visual flight rules (VFR) aircraft. Class B airspace is also charted on VFR Sectionals and instrument flight rules (IFR) Enroute Low Altitude charts. You don’t want an incorrect altimeter setting to cause an airspace incursion.
AeroSavvy
JANUARY 16, 2024
Green – VFR ( Visual Flight Rules ) Ceiling > 3,000 ft. Only two elements of the METAR were used: cloud height and visibility.
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