include advisories such as Airman’s Meteorological  Information (AIRMETs), Significant Meteorological  Information (SIGMETs), convective SIGMETs, and  urgent pilot weather reports (PIREPs/UUA). These  broadcasts are only a summary of the information,  and pilots should contact an FSS for detailed  information.  or Enhanced Weather Information System (EWINS) when  approved in the OpSpecs. As an integral part of EWINS  approval, the procedures for collecting, producing, and  disseminating aeronautical weather information, as well  as the crewmember and dispatcher training to support  the use of system weather products, must be accepted or  approved.  Operators not certificated under the provisions of 14  CFR Part 119 are encouraged to use FAA/NWS products  through the Flight Service Stations (FSS). FSS provide pilot  weather briefings, en route weather, receive and process  instrument flight rule (IFR) and visual flight rule (VFR) flight  plans, relay air traffic control (ATC) clearances, and issue  NOTAMs. They also provide assistance to lost aircraft and  aircraft in emergency situations and conduct VFR search  and rescue services.  Direct User Access Terminal System (DUATS), funded by the  FAA, allows any pilot to access weather information and file  a flight plan via computer. Two contract vendors currently  provide information services within the DUATS system,  and can be accessed via the Internet at www.duats.com  or www.1800wxbrief.com. The current vendors of DUATS  II service and the associated phone numbers are listed in  Chapter 7 of the Aeronautical Information Manual (AIM).  The suite of available aviation weather product types  is expanding with the development of new sensor  systems, algorithms, and forecast models. The FAA and  NWS, supported by the NCAR and the NOAA Forecast  Systems Laboratory (FSL), develop and implement new  aviation weather product types through a comprehensive  process known as the Aviation Weather Technology  Transfer process. This process ensures that user needs  and technical and operational readiness requirements are  met as experimental product types mature to operational  application.  Flight Information Service—Broadcast (FIS-B) provides  certain aviation weather and other aeronautical information  to aircraft equipped with an appropriate flight deck display.  Reception of FIS-B services can be expected within a  ground station coverage volume when line-of-sight  geometry is maintained between the aircraft and ground  station. National Airspace System (NAS) wide service  availability was targeted for 2013 and is currently available  within certain regions. FIS-B provides the following textual  and graphical aviation weather and aeronautical products  free-of-charge. A detailed description of these products  can be found in the AIM.  The development of enhanced communications  capabilities, most notably the internet, has allowed pilots  access to an increasing range of weather service providers  and proprietary products. It is not the intent of the FAA to  limit operator use of this weather information. However,  pilots and operators should be aware that weather services  provided by entities other than the FAA, NWS, or their  contractors (such as the DUATS and flight information  services data link (FISDL) providers) may not meet FAA/  NWS quality control standards.  The most common method used by flight crews to obtain  specific in-flight weather information is to use a source that  broadcasts weather for the specific airport. Information  about ceilings, visibility, wind, temperature, barometric  4-4  • Hazardous In-flight Weather Advisory Service  (HIWAS) is a national program for broadcasting  hazardous weather information continuously over  selected navigation aids (NAVAIDs). The broadcasts  • Aviation Digital Data Services (ADDS) provides the  aviation community with text, digital and graphical  forecasts, analyses, and observations of aviation  related weather variables. ADDS is a joint effort of  National Oceanic and Atmospheric Administration’s  (NOAA) Earth System Research Laboratory, National  Center for Atmospheric Research (NCAR) Research  Applications Laboratory (RAL), and the Aviation  Weather Center (AWC).  • Telephone Information Briefing Service (TIBS)  is a service prepared and disseminated by  Flight Service. It provides continuous telephone  recordings of meteorological and aeronautical  information. Specifically, TIBS provides area and  route briefings, as well as airspace procedures and  special announcements, if applicable. It is designed  to be a preliminary briefing tool and is not intended  to replace a standard briefing from a flight service  specialist. The TIBS service is available 24 hours a day  and is updated when conditions change, but it can  only be accessed by a touch tone phone. The phone  numbers for the TIBS service are listed in the Chart  Supplement, formerly the Airport/Facility Directory  (A/FD). TIBS should also contain, but is not limited to:  surface observations, terminal aerodrome forecast  (TAFs), and winds/temperatures aloft forecasts.  Broadcast Weather 