[Code of Federal Regulations]
[Title 14, Volume 2]
[Revised as of January 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR125.51]

[Page 648]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION 
                               (CONTINUED)
 
PART 125_CERTIFICATION AND OPERATIONS: AIRPLANES HAVING A SEATING 
 
      Subpart B_Certification Rules and Miscellaneous Requirements
 
Sec. 125.51  En route navigational facilities.

    (a) Except as provided in paragraph (b) of this section, no 
certificate holder may conduct any operation over a route unless 
nonvisual ground aids are--
    (1) Available over the route for navigating airplanes within the 
degree of accuracy required for ATC; and
    (2) Located to allow navigation to any airport of destination, or 
alternate airport, within the degree of accuracy necessary for the 
operation involved.
    (b) Nonvisual ground aids are not required for--
    (1) Day VFR operations that can be conducted safely by pilotage 
because of the characteristics of the terrain;
    (2) Night VFR operations on routes that the Administrator determines 
have reliable landmarks adequate for safe operation; or
    (3) Operations where the use of celestial or other specialized means 
of navigation, such as an inertial navigation system, is approved.