Civil twilight biography definition faa

Night aviation regulations in the United States are administered and enforced by the Federal Aviation Administration (FAA). Unlike many countries,^[1][2][3][4] the United States places no special restrictions on VFR flying at night.

Section 2. Special Operations - Federal Aviation Administration

Definitions

Three different concepts of "night" are referred to in the Federal Aviation Regulations in the US. These include the periods from

1. sunset to sunrise - used for nav lights,
2. the end of evening civil twilight to the beginning of morning civil twilight (this is the "standard definition of night", given in FAR Section ) - used for logging night flight,
3. one hour after sunset to one hour before sunrise - used for night currency and carrying passengers.

These uses of night are listed in order of increasing restrictiveness.

The end of evening civil twilight generally occurs less than one hour after sunset. AirNav is a good source for sunset and sunri Night Definitions and Operations - Legal & Medical Services ... GEP