Nav Lights In U.S Airspace?
 

Hello..
Could anybody please show me the regulations regarding the use of Navigation Lights in U.S airspace for airline operations (FAR 129)..

Thanks Alot
Cheers
Wilco77

Section 91.209: Aircraft lights.

No person may:
(a) During the period from sunset to sunrise (or, in Alaska, during the period a prominent unlighted object cannot be seen from a distance of 3 statute miles or the sun is more than 6 degrees below the horizon)--
(1) Operate an aircraft unless it has lighted position lights;
(2) Park or move an aircraft in, or in dangerous proximity to, a night flight operations area of an airport unless the aircraft--
(i) Is clearly illuminated;
(ii) Has lighted position lights; or
(iii) is in an area that is marked by obstruction lights;
(3) Anchor an aircraft unless the aircraft--
(i) Has lighted anchor lights; or
(ii) Is in an area where anchor lights are not required on vessels; or
(b) Operate an aircraft that is equipped with an anticollision light system, unless it has lighted anticollision lights. However, the anticollision lights need not be lighted when the pilot-in-command determines that, because of operating conditions, it would be in the interest of safety to turn the lights off.

[Doc. No. 27806, 61 FR 5171, Feb. 9, 1996]

Why do you want to know?

Most majors operate with nav light ON for all operations - SOP.

Here's the part 121 regs (in addition to part 91 from bubba):

http://www.risingup.com/fars/info/part121-323-FAR.shtml