Required Equipment for IFR Flight

In addition to the equipment required for VFR flight, there are certain pieces of equipment that are required in order to fly under Instrument Flight Rules legally (FAR 91.205). An easy way to remember what equipment is required for IFR flight is "GRABCARD"

G - Generator
R - Radios
A - Attitude Indicator
B - Ball
C - Clock
A - Adjustable Altimeter
R - Rate of Turn Indicator
D - Directional Gyro