(1) Terrain clearance.
(2) Minimum en route altitudes.
(3) Ground and airborne navigation aids.
(4) Air traffic density.
(5) ATC procedures.
(b) Any route widths of other routes determined by the Administrator are specified in the certificate holder's operations specifications.
[Doc. No. 6258, 29 FR 19195, Dec. 31, 1964, as amended by Amdt. 121–253, 61 FR 2610, Jan. 26, 1996]
NEXT: Sec. 121.117 - Airports: Required data.
PREVIOUS: Sec. 121.113 - Area and route requirements: General.