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pertinent weather data tailored to a specific altitude
and route using the most current available sources of
aviation meteorological information.
4-6-2. POSITION RESPONSIBILITIES
Prior to assuming the duties of the flight watch
position:
a. Perform a thorough self-briefing by reviewing
available weather data.
b. When relieving a specialist on the FW position,
obtain a preduty briefing from the person being
relieved.
c. When appropriate, obtain a briefing of current
and forecast weather within the flight watch area
(FWA) from the CWSU of the associated ARTCC.
(See para 4-6-5.)
d. Maintain currency of weather conditions and
trends while assigned the FW position by reviewing
new or revised meteorological issuances and by
observing weather trends contained in current
weather reports and PIREPs.
4-6-3. OPERATING PROCEDURES
a. Tailor en route flight advisories to the phase of
flight that begins after climb out and ends with
descent to land. Current weather and terminal
forecast at the airport of first intended landing and/or
the alternate airport shall be provided on request.
When conditions dictate, provide information on
weather for alternate routes and/or altitudes to assist
the pilot in the avoidance of hazardous flight
conditions. Advise the pilot to contact the adjacent
flight watch facility when adverse weather conditions
along the intended route extend beyond the FWA.
b. EFAS shall not be used for routine inflight
services; e.g., flight plan filing, position reporting, or
full route (preflight) briefings. If a request for
information is received that is not within the scope of
EFAS, advise the pilot of the appropriate AFSS/FSS
to contact.
EXAMPLE-
“Cessna Four Seven Five Eight Xray, Cleveland Flight
Watch, contact Altoona Radio on one two two point four
to file your flight plan.”
c. Suggest route or destination changes to avoid
areas of weather which in the judgment of the
specialist constitute a threat to safe flight.
d. Alert the associated CWSU or WSFO
immediately of reported or observed significant
weather that is not included in aviation forecasts.
4-6-4. FREQUENCIES
a. Use frequency 122.0 mHz to provide EFAS to
aircraft below FL 180.
b. Use the assigned discrete frequency to provide
EFAS to aircraft at FL 180 and above. This frequency
can also be used for communications with aircraft
below FL 180 when communication coverage
permits.
c. Aircraft operating at FL 180 or above that
contact FW on frequency 122.0 mHz should be
advised to change to the discrete frequency for EFAS.
PHRASEOLOGY-
(Aircraft identification) (facility) FLIGHT WATCH, FOR
SERVICE AT YOUR ALTITUDE, CONTACT FLIGHT
WATCH ON (frequency).
d. Avoid the simultaneous keying of two or more
transmitters on the same frequency. This action can
block or hinder communications.
NOTEFrequency
122.0 mHz RCF outlets are geographically
located to ensure communications coverage at 5,000 feet
AGL and above over the conterminous United States.
High altitude discrete frequency RCF outlets are
geographically located to ensure communications
coverage between FL 180 and FL 450 over the EFAS
facility's area of responsibility. Communications practices
should be guided by these restrictions.
4-6-5. NWS SUPPORT TO EFAS
The NWS support function for EFAS is as follows:
a. The associated CWSU is designated as the
primary support facility for each EFAS facility. The
CWSU should be contacted at least once per shift for
a general briefing of meteorological conditions
JO 7110.10T 2/14/08
4-6-2 En Route Flight Advisory Service (EFAS)
which are impacting, or expected to impact, aviation
weather within the FW/ARTCC area.
NOTEDue
to assigned priorities, the CWSU meteorologist may
not be able to provide indepth briefing service for up to
2hours after the start of the first shift of the CWSU unit.
(See FAAO JO 7210.3, Para 14-3-6, National Weather
Service (NWS) Support, for establishment of operational
support.)
b. During the period when the CWSU is not
available to provide consultation service, WSFOs are
responsible for responding to EFAS facility requests
regarding weather conditions prevailing within the
WSFO area of responsibility. The EFAS specialist
should contact the responsible WSFO directly for
clarification of forecasts or questions concerning
products originated by the WFSO.
NOTEThe
ARTCC/EFAS area may encompass multiple WSFO
areas.
c. Consult with the National Aviation Weather
　
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