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EFAS - En Route Flight Advisory Service

EFAS, also known as Flight Watch, provides pilots with real time flight related data to increase flight safety. EFAS is available from 0600 to 2200 local time on the Universal Flight Watch Frequency of 122.0MHz below 17,500ft . High altitude (above 17,500ft) frequencies can be obtained from ATC in flight, but are also shown in the table at the bottom of the page.

The Flight Watch service is specifically designed to provide, upon pilot request, timely current weather information pertinent to the type of flight, intended route of flight and altitude. Flight watch is dependent on pilot participation by soliciting and providing Pilot Weather Reports (PlREPS) within the flight watch area. This service is not intended to replace a Preflight Weather Briefing. The purpose of the EFAS position is to update your briefing while enroute. Communications with a flight watch station should be possible at altitudes of 5,000 feet and above throughout the conterminous United States. The radio call sign for the an EFAS station is "(City Name) Flight Watch". Upon initial call up, state the radio call sign for the EFAS station followed by your aircraft identification, and append the name of the nearest VOR to your position.

For flights at 5,000 feet AGL to 17,500 MSL, contact Flight Watch on 122.0 anywhere in the conterminous U.S. and Puerto Rico from 6 a.m. to 10 p.m. Use the discrete EFAS frequencies below for flights at 18,000 through 45,000.

Callsign   Frequency
Boston Flight Watch ZBW 133.925
New York Watch ZNY 134.725
Washington Flight Watch ZDC 134.525
Jacksonville Flight Watch ZJX 134.175
Miami Flight Watch ZMA 132.725
Cleveland Flight Watch ZOB 135.425
Indianapolis Flight Watch ZID 134.825
Atlanta Flight Watch ZTL 135.475
Chicago Flight Watch ZAU 134.875
Memphis Flight Watch ZME 133.675
Minneapolis Flight Watch ZMP 135.675
Kansas City Flight Watch ZKC 128.475
Fort Worth Flight Watch ZFW 133.775
Houston Flight Watch ZHU 126.625
Salt Lake City Flight Watch ZLC 133.025
Denver Flight Watch ZDV 124.675
Albuquerque Flight Watch ZAB 134.825
Seattle Flight Watch ZSE ZSE 135.925
Oakland Flight Watch ZOA ZOA 135.7
Los Angeles Flight Watch ZLA ZLA 135.9
5000ft to 17,500ft Flight Watch   122.0