FAA standard
5−8−4. DEPARTURE AND ARRIVAL
TERMINAL. Except as provided in para 5−8−5,
Departures and Arrivals on Parallel or Nonintersecting
Diverging Runways, separate a departing aircraft
from an arriving aircraft on final approach by a
minimum of 2 miles if separation will increase to a
minimum of 3 miles (5 miles when 40 miles or more
from the antenna) within 1 minute after takeoff.
NOTE−
1. This procedure permits a departing aircraft to be
released so long as an arriving aircraft is no closer than
2 miles from the runway at the time. This separation is
determined at the time the departing aircraft commences
takeoff roll.
2. Consider the effect surface conditions, such as ice,
snow, and other precipitation, may have on known aircraft
performance characteristics, and the influence these
conditions may have on the pilot’s ability to commence
takeoff roll in a timely manner.