T-6A INSTRUMENT NAVIGATION
1. Unless specified otherwise, required obstacle clearance for all
departures, including diverts, is based on the pilot crossing the
departure end of the runway at least 35 feet above the departure
end of runway elevation at civilian and army fields, 0 feet at Air
Force and Navy fields, climbing to 400 feet above the departure
end of runway elevation before making the initial turn, and
maintaining a minimum climb gradient of 200 feet per nautical
mile (FPNM), unless required to level off by a crossing restriction,
until the minimum IFR altitude. A greater climb gradient may be
specified in the DP to clear obstacles or to achieve an ATC
2. DPs will be listed by airport in the IFR Takeoff Minimums
and Departure Procedures, Section C, of the Terminal Procedures
Publications (TPPs). An Obstacle Departure Procedure (ODP) that
has been developed solely for obstacle avoidance will be indicated
with the symbol "T"
on appropriate IAP charts and DP
charts for that airport.
9. Hack the clock (if not previously accomplished), then contact Tower for takeoff. Read
back ALL takeoff or hold short instructions verbatim.
10. After cleared to "Takeoff" or "Position and Hold" by Tower, accomplish the Lineup Check.
Once complete report, "Lineup check complete."
402. INSTRUMENT DEPARTURES
An instrument departure is a procedure used to increase efficiency and reduce communications
and departure delays. Additionally, it provides obstacle clearance protection to aircraft in IMC
conditions. There are two types of departures, radar departures and DPs/SIDs.
A radar departure is a procedure that may use radar vectors to allow the aircraft to proceed
directly to either the first point in the flight plan or intercept an airway instead of using published
DP courses. Many military and civilian fields do not have published DPs. When departing these
airports, the student generally files direct to the nearest fix along their intended route of flight.
Placing the note, "Request radar departure" in the remarks section of the DD 175 informs ATC
you can accept radar vectors. This allows ATC to vector you to an enroute fix on the airway via
the route that is most compatible with the local traffic flow while ensuring a safe climb out.