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218 Airline Flight Operations
planning, publication/flight manual updating, or other administrative responsibilities. Once
introductions between crew members are complete, the flight crew begins the planning
tasks. In situations where the time available before departure is minimal, the first officer
may proceed to the aircraft to begin the pre-flight duties there, while the captain completes
the requisite paperwork in the flight operations office.
8.3.2 Operations/Planning
Most airlines have a central Airline Operations Control Center (AOCC) staffed by certified
flight dispatchers. Their duties include the planning and “flight following” for as many as
20 (or more) concurrent flights. The flight planning task involves selecting the best routing
(in terms of time, fuel burn, ride conditions, etc.) given the available information, and gen-
erating a “flight plan” that can be programmed into the aircraft automation. This accounts
for aircraft type, forecast weather conditions, aircraft performance, loads and operating
weights, aircraft mechanical condition, marketing constraints, airport limitations/curfews
and company priorities (e.g., minimum fuel versus minimum time trajectory). This last
issue is quantified via the “cost index” parameter which is the ratio of time-related costs
to fuel-related costs and is a major driver of flight plan optimization given that minimum
time and minimum fuel trajectories can be quite different (Airbus, 1998). The resulting
flight plan is the means by which the dispatcher communicates the details of a flight to the
cockpit crew and is usually available for retrieval via computer terminal approximately
1 hour before departure time. The flight plan details various aspects of the flight, such
as routing, weather, alternate airport options, fuel requirements, takeoff performance and
loads (which are subject to last-minute changes).
The flight plan is printed out and its details are examined by the incoming cockpit
crew. Agreement is typically indicated by the captain’s signature on the paper or elec-
tronic “station copy” of the flight plan. In many cases, no direct communication with the
dispatcher is necessary unless changes in fuel load or routing, weather, aircraft operational
status/mechanical discrepancies and/or any anticipated d