Clearance Instrument Meteorological Conditions Omni-Directional Range 
WayMan
JUNE 16, 2025
Altimeter: Shows the altitude of the aircraft above a designated reference point, essential for flight level assignment and terrain clearance. Attitude Indicator (Artificial Horizon): Shows the orientation (pitch and bank) of the aircraft relative to the horizon of the Earth, essential for instrument meteorological conditions flight.
Pilot Institute
MARCH 6, 2025
In contrast to a control tower, an FSS is not responsible for giving instructions or clearances to aircraft. VFR Visual Flight Rules VFR is a set of regulations that allow a pilot to operate an aircraft using visual cues and without relying on instruments. VFR requires minimum weather and visibility conditions.
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