Instrument

Definitions

• Means a device using an internal mechanism to show visually or aurally the attitude, altitude, or operation of an aircraft or aircraft part. It includes electronic devices for automatically controlling an aircraft in flight.
• According to Title 14 of the Code of Federal Regulations, A device using an internal mechanism to show visually or aurally the attitude, altitude, or operation of an aircraft or aircraft part. There are only two instruments required in a hot air balloon: vertical speed indicator (VSI) and altimeter.

References

• 14 C.F.R. Part 1, Federal Aviation Administration, 2026
• Balloon Flying Handbook, Federal Aviation Administration, 2024