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 |
