T-45A UJPT & E2-C2 INAV08
Fuel, Weather, and Alternate Airfield Planning
One may use a pencil laid on the HSI to approximate the computer's output. The computer can be used to
determine the course and distance from the IAF at your destination to the IAF at the alternate as follows.
Point-To-Point (IAF to IAF)
On the front side, lower portion of the Jet
Flight Log are spaces for cruising from
destination Initial Approach Fix (IAF) to the
alternate Initial Approach Fix. The "Wind
Side" of the Navigation Computer can be
used to determine magnetic course and
distance for this leg of the flight using a
common feeder facility for the two IAF
navigation facilities.
Step 1
Using forecast winds, determine
appropriate Approach Procedure Charts for
the probable runways in use at destination
and alternate, based on forecast surface
winds.
EXAMPLE:
Destination:
New Orleans NAS
Alternate:
Pensacola NAS
Figure 7: NAS NEW ORLEANS APPROACH
Step 2
Locate a NAVAID common to both
Approach Procedure Charts which have
"Feeder Routes" to the two IAFs.
EXAMPLE:
Semmes VORTAC is depicted on both
charts with "Feeder Routes" to the
Pensacola and New Orleans IAFs.
Note: "Feeder Routes" bearing and range
are to the IAF, NOT the holding fix or the
NAVAID.
Figure 8: NAS PENSACOLA APPROACH
(6-99) Original
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