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Which instrument is required for IFR under 91.205(d) but not for day VFR?

A gyroscopic rate-of-turn indicator.

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  1. Magnetic compass
  2. Altimeter
  3. Gyroscopic rate-of-turn indicator ✔

Why: 91.205(d) adds instruments to the day VFR list: a gyroscopic rate-of-turn indicator, slip-skid indicator, sensitive altimeter, clock with seconds, generator, and gyro pitch and bank and direction instruments.

Huh, didn't know that: Some airplanes with a third attitude indicator are excused from the rate-of-turn requirement.

The dad joke
The turn coordinator is the only instrument that can say 'you're sliding' without being rude.
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References

Answer: Gyroscopic rate-of-turn indicator. 91.205(d) adds instruments to the day VFR list: a gyroscopic rate-of-turn indicator, slip-skid indicator, sensitive altimeter, clock with seconds, generator, and gyro pitch and bank and direction instruments.

  1. 14 CFR 91.205 Powered civil aircraft: instrument and equipment requirements www.law.cornell.edu/cfr/text/14/91.205
    Gyroscopic rate-of-turn indicator
    Checked 2026-10-10.

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