Flight time

"[4] Most government licensing regulations have specific flight hour requirements, as do virtually all airline job listings.

In general aviation it is often rounded to the nearest 5 minutes or recorded in decimal rounded to the nearest 0.1 hour, which corresponds to the resolution of a typical Hobbs meter, an odometer-like instrument installed in most light aircraft.

[10] In the United States, the Federal Aviation Administration imposes different flight time limits for each type of air carrier operations.

[11] As defined in Part 117, the daily flight time limits are extremely complex.

The regulations take into account the ability of airlines to rotate crew members operating airliners through a crew rest compartment to get adequate rest on long-haul flights (which the FAA calls "augmented operations").