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T-45C TS & IUT INav-11
Practical Problems
Preliminary Weather Briefing
You have determined that you want to go to a particular destination, NAS JAX. The first thing you should
do prior to beginning your preflight planning is to stop by the weather office. It would be pointless to plan a
flight to your destination only to find that the weather there is unsuitable. You can get a preliminary
weather briefing up to a week in advance of your flight. The forecaster can give you a general idea of what
kind of weather to expect depending on the time of year, as well as probable en route and surface winds.
An OPARS could be run based on historical data. At this time an OPARS request can be made for your
ETD (which should be made at least 24 hours in advance if at all possible).
You will be looking for the following information in the weather office:
*
Severe weather warning (WW) areas: found on the WW board
*
Surface weather depiction chart: areas of IFR (red) and marginal VFR (blue) weather
NOTE: Use this information to determine the direction to fly for emergency fields if the need for one
occurs in flight.
*
Surface analysis chart: locations of weather fronts along your route
Ask for:
*
Your destination forecast weather based on estimated time of departure (ETD) and estimated time en
route (ETE). If it appears that an alternate is required, ask for the forecast weather at suitable fields in
your destination area and within your range of flight.
*
The flight level of most favorable winds, weather permitting, along your intended route of flight
*
The forecast surface winds at your destination and alternate fields in order to plan for a particular
approach
*
DD-175-1 flight weather briefing
Weather Briefing Information
*
Altitude: The most favorable winds and weather en route are at FL370.
*
Climb winds: Training squadrons do not use climb winds in type C class (tactical jet) aircraft. Refer to
the climb data in Figure 10 of this workbook and read distance, time, and fuel directly from the chart
for the appropriate altitude.
*
Winds aloft:
Meridian to Montgomery
280 degrees/60 kts
Montgomery to Seminole
280 degrees/60 kts
Seminole to Taylor
270 degrees/50 kts
Taylor to NAS JAX
270 degrees/50 kts
NAS JAX to Moody AFB
270 degrees/50 kts
NAS JAX IAF altitude
FL200; 250 degrees/30 kts
Page 11-4
(2-02) Original


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