Instrument Departures

T-6A INSTRUMENT NAVIGATION

CHAPTER FOUR

NOTES

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

crossing restriction.

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.

RADAR DEPARTURE

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.

INSTRUMENT NAVIGATION

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