Night aviation regulations in the United States

Lore & Background

The Federal Aviation Regulations in the United States refer to three different concepts of "night." The period from sunset to sunrise is used for navigation lights and for the restriction on Special VFR clearances, which requires the pilot and aircraft to be rated and equipped for IFR. The period from the end of evening civil twilight to the beginning of morning civil twilight is the standard definition of night given in FAR Section 1.1 and is used for logging night flight. The period from one hour after sunset to one hour before sunrise is used for night currency and for carrying passengers. These uses are listed in order of increasing restrictiveness, and the end of evening civil twilight generally occurs less than one hour after sunset.

Pilots must maintain night currency every 90 days to carry passengers at night. Specifically, FAR 61.57(b) requires that within the preceding 90 days, the pilot has made at least three takeoffs and three landings to a full stop during the period beginning one hour after sunset and ending one hour before sunrise, acting as sole manipulator of the flight controls, and performing the takeoffs and landings in an aircraft of the same category, class, and type (if a type rating is required). Additional equipment required for VFR flight during the standard definition of night is given in FAR 91.205c and summarized by the FLAPS mnemonic: Fuses, Landing light (if for hire), Anti-collision lights, Position lights, and Source of electricity.

Reader's Guide

The layered definitions of night in U.S. aviation regulations create a structured framework that balances safety with operational flexibility. By assigning different time periods to different regulatory functions—navigation lights, flight logging, currency requirements, and passenger carriage—the FAA tailors requirements to the specific risks and needs of each activity. The most restrictive period, one hour after sunset to one hour before sunrise, governs both pilot currency and the carriage of passengers, ensuring that pilots operating in the darkest conditions have recent night experience. The standard definition of night, from civil twilight to civil twilight, is used for logging flight time, providing a consistent baseline for pilot records. The sunset-to-sunrise period applies to position lights and Special VFR restrictions, addressing visibility and equipment concerns. This tiered approach allows pilots to log night hours under a broader definition while requiring more stringent recency for passenger operations. The FLAPS equipment requirements further ensure that aircraft are properly equipped for night VFR flight. The system's legacy is its practical accommodation of varying night conditions without imposing a single, overly restrictive definition across all contexts.

Did You Know?

• The United States places no special restrictions on VFR flying at night.
• Three different concepts of 'night' are referred to in the Federal Aviation Regulations.
• The FLAPS mnemonic summarizes additional equipment required for night VFR flight: Fuses, Landing light (if for hire), Anti-collision lights, Position lights, and Source of electricity.