§91.181

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§ 91.181 Course to be flown.

Unless otherwise authorized by ATC, no person may operate an aircraft within controlled airspace under IFR except as follows:

(a) On an ATS route, along the centerline of that airway.

(b) On any other route, along the direct course between the navigational aids or fixes defining that route. However, this section does not prohibit maneuvering the aircraft to pass well clear of other air traffic or the maneuvering of the aircraft in VFR conditions to clear the intended flight path both before and during climb or descent.

Part §91 Subpart B — Flight Rules
§91.101 Applicability • §91.103 Preflight • §91.105 Crewmembers at stations • §91.107 Seatbelts • §91.109 Flight instruction • §91.111 Near other aircraft
§91.113 Right-of-way • §91.115 Right-of-way on water • §91.117 Speed Limits • §91.119 Minimum altitudes • §91.121 Altimeter • §91.123 ATC instructions • §91.125 Light signals
§91.126 Class G • §91.127 Class E • §91.129 Class D • §91.130 Class C • §91.131 Class B • §91.133 Restricted areas • §91.135 Class A
§91.137 TFRs • §91.138 Hawaiian TFRs • §91.139 Emergency traffic • §91.141 Presidential TFRs • §91.143 Space ops • §91.144 High barometric pressure
§91.145 Air shows & and sporting events • §91.146 Charity flights • §91.147 Paying-passenger flights
§91.151 VFR Fuel reserves • §91.153 VFR flight plans • §91.155 VFR weather minimums • §91.157 Special VFR • §91.159 VFR cruising altitude • §91.161 DC ADIZ
§91.167 IFR Fuel reserves • §91.169 IFR flight plans • §91.171 VOR test • §91.173 ATC clearances • §91.175 IFR Takeoffs and landing
§91.177 IFR Minimum altitudes • §91.179 IFR cruising altitudes • §91.180 RVSM • §91.181 Course flown • §91.183 IFR comm. • §91.185 IFR radio failure
§91.187 Malfunctions in IFR • §91.189 Cat II & III ops. • §91.191 Cat II & III manual • §91.193 Certain Cat II ops.