Altimeter Transponder Visual Flight Rules 
Northstar VFR
AUGUST 25, 2024
A: ALTIMETER/PILOT STATIC INSPECTION (FAR 91.411) If flying under IFR, an aircraft’s static system, altimeter and automatic Mode C altitude-reporting system must be inspected within the preceding 24 calendar months. One major difference is that any A&P technician can endorse the inspection.
Pilot Institute
APRIL 24, 2024
They try to make the underlying airspace easily navigable by visual flight rules (VFR) aircraft. All aircraft inside the veil must have an operating Mode C transponder and ADS-B Out. Regardless of flight rules, you must meet the equipment requirements before entering. Equipment Requirements A two-way radio.
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