Metro-03
Meteorology Review
?
What are the exceptions to the OPNAVINST 3710.7
restriction prohibiting flight in WW and CAWW
areas?
ANSWER:
1. Operational necessity
2. Research/weather reconnaissance
3. Emergencies
4. Storm development has not progressed as forecast, and
a. when flight remains in VFR conditions, or
b. if in IFR conditions, operable weather radar is installed
in the aircraft
5. The aircraft is capable of flying above the hazard
3.
Convective SIGMETs (WST)
Sg 6, fr 11
Fig 21: Convective
a.
In-flight advisory alerts pilots to convective
SIGMET (WST)
activity and related hazards posing danger to
all types of aircraft
b.
Hazards include lines and large areas of
thunderstorms, tornadoes, and embedded
thunderstorms
4.
SIGMETs (WS) 1.1.1.11.2
Sg 6, fr 12
Fig 22: SIGMET
a.
In-flight advisory alerts pilots to weather
(WS)
hazards that pose danger to all types of aircraft
b.
Hazards include severe icing and turbulence
and large areas of IFR conditions
5.
AIRMETs (WA): in-flight and teletype advisory
Sg 6, fr 13
alerting pilots to hazards that are not as severe as
Fig 23: AIRMET
SIGMETs and/or convective SIGMETs 1.1.1.11.1
(WA)
(7-97) Original
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