IRFP-01
Metro Review
2. Horizontal Weather Depiction Chart
a. Prepared for your proposed flight time and path
b. Depicts atmospheric conditions from surface to 5,000 ft above
the proposed flight level for the entire route and includes:
(1) Areas of 5/8 or more of cloud coverage
(2) All areas of cumulonimbus (CB), towering cumulus (TCU),
in eighths coverage, along with tops and bottoms
(3) Heights of freezing level
(4) Fronts and pressure centers with movements
(5) Significant weather and obstructions to visibility
(6) Hazards to flight
(7) Proposed route of flight
(8) Any miscellaneous entries deemed operationally significant
3. Completed DD-175-1
a. Pilot shall receive a verbal briefing as well as the weather
briefing form
4. Upper wind charts for proposed flight level(s) or OPARS
customized flight plan
C. Use
1. Folder contents serve as reminders of weather expected to
encounter en route and stopover terminals
2. Pilot should note any deviations from weather
3. Pilots should turn in folder at final destination and if possible
debrief with the forecaster actual conditions encountered in flight
IX. Optimum Path Aircraft Routing System (OPARS) 21.1.1.11.5
A. General
1. Primary purpose of OPARS is to provide computer-prepared flight
Fig 35: OPARS
planning service to the Naval Aviation community
Kneeboard Output
2. Service provides customized flight plan which can be used in many
different ways
(8-97) Original
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