INSTRUMENTS FLIGHT PLANNING
Named intersections are listed in the ROUTE OF FLIGHT section by name rather than
radial/DME. If we were taking a flight from Navy Meridian to Vulcan, through the SALMS
intersection, to Memphis, to Navy Memphis IAF, we enter:
Figure 2-16 Route of Flight 3
Notice in both preceding examples that our last point is an IAF. Most IAFs you use are defined
by a TACAN radial and DME. When writing that information on a DD 175, the numbers
corresponding to the radial/DME are given together as six digits. Note how the following NPA
TACAN fixes are written:
015o/5 NM = 015005
125o/100 NM = 125100
001o/1 NM = 001001
It is not necessary to file to the IAF as your last point. You may
also use any NAVAID nearest the field.
In the TO block, enter the three-letter identifier of the aerodrome of your intended landing
opposite the last line entry in the route of flight. In the ETE block, write the time (in hours and
minutes) that you computed on your jet log to the IAF. Do not include any time for the
Figure 2-17 TO/ETE
It is imperative that your ETE is accurate. If you lose your radio enroute in IMC conditions and
cannot land VMC, you would be expected at the VAD IAF one hour and six minutes after T/O.
ATC would clear traffic so your flight path would not be impeded and you could commence an
approach from the IAF at that time.
2-10 DD 175 FLIGHT PLAN