CFI Instrument Practical Test Standards,
FAA-S-8081-9B, June 2001
III. Preflight Preparation
A. Weather Information
1. Sources of weather-
b. PATWAS and TIBS
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1) Pilot's automatic telephone weather answering service (PATWAS)
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a) Provided by nonautomated FSS
b) Recorded telephone briefing
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i) Local area forecast (usually within a 50 NM radius)
ii) Some also include route forecasts siimilar to TWEB
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a) Weather and aeronautical information
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i) Area and/or route briefings
ii) Airspace procedures
iii) Special announcements
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i) METARs
ii) TAFs
iii) Winds aloft
d) TIBS information is the same as in a standard briefing
e) Use as preliminary briefing (not intended to substitute for specialist-provided preflight briefing)