IFR - References

FAR

91.167 - 91.189

• 91.171 VOR checks for IFR
• 91.175 The list of "runway environment"
• 91.177 IFR min altitudes
• 91.185 Lost comm

95

• 95.15 US mountainous area

AIM

• VOR Service Volume: 1-1-3
• VOR Checks: 1-1-4