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PVT Regulations

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  1. Part 61 Regulations

    §61.3 Requeriments for certificates
  2. §61.19 Duration of pilot certificates
  3. §61.23 Medical Certificates: Requirement and Duration
  4. §61.31 Type Rating and additional training requirements
  5. §61.51 Pilot Logbooks
  6. §61.56 Flight Review
  7. §61.57 Recent flight experience: Pilot in command
  8. §61.60 Change of address
  9. §61.103 - Eligibility requirements
  10. §61.113 Private pilot privileges and limitations
  11. Part 91 Regulations
    §91.3 Responsibility and authority of the pilot in command
  12. §91.7 Civil aircraft airworthiness
  13. §91.9 Civil aircraft flight manual, marking, and placard requirements
  14. §91.13 Careless or reckless operation
  15. §91.15 Dropping objects
  16. §91.17 Alcohol or drugs
  17. §91.21 Portable electronic devices
  18. §91.103 Preflight action
  19. §91.105 Flight crewmembers at stations
  20. §91.107 Use of safety belts and shoulder harnesses
  21. §91.109 Flight instruction; Simulated instrument flight
  22. §91.111 Operating near other aircraft
  23. §91.113 Right-of-way rules: Except water operations
  24. §91.117 Aircraft speed
  25. §91.119 Minimum safe altitudes: General
  26. §91.121 Altimeter settings
  27. §91.123 Compliance with ATC clearances and instructions
  28. §91.125 ATC light signals
  29. §91.144 Temporary restriction on flight operations during abnormally high barometric pressure conditions
  30. §91.151 Fuel requirements for flight in VFR conditions
  31. §91.155 Basic VFR weather minimums
  32. § 91.157 Special VFR weather minimums
  33. §91.159 VFR cruising altitude or flight level
  34. §91.203 Civil aircraft: Certifications required
  35. §91.205 Instrument and equipment requirements
  36. §91.207 Emergency locator transmitters
  37. §91.209 Aircraft lights
  38. §91.211 Supplemental oxygen
  39. §91.213 Inoperative instruments and equipment
  40. § 91.215 ATC transponder and altitude reporting equipment and use
  41. §91.409 Inspections
  42. §91.413 ATC transponder tests and inspections
  43. NTSB 830
    §830.1 Applicability
  44. §830.2 Definitions
  45. §830.5 - Immediate notification
  46. §830.6 - Information to be given in notification
  47. Miscellaneous
    Part 43 Appendix A Part C
  48. References
Lesson 26 of 48
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§91.121 Altimeter settings

Mateo Espin January 14, 2021

§91.121 Altimeter settings

(a) Each person operating an aircraft shall maintain the cruising altitude or flight level of that aircraft, as the case may be, by reference to an altimeter that is set, when operating –

(1) Below 18,000 feet MSL, to –

(i) The current reported altimeter setting of a station along the route and within 100 nautical miles of the aircraft;

(ii) If there is no station within the area prescribed in paragraph (a)(1)(i) of this section, the current reported altimeter setting of an appropriate available station; or

(iii) In the case of an aircraft not equipped with a radio, the elevation of the departure airport or an appropriate altimeter setting available before departure; or

(2) At or above 18,000 feet MSL, to 29.92″ Hg.


For more information refer to §91.121