AIRMET, SIGMET AND SPECIAL AIR REPORT

AIRMET and SIGMET have similar layout and abbreviations but different areas of coverage. The difference between the two is shown in their respective definition.

AIRMET

AIRMET is defined as information issued by a meteorological watch office concerning the occurrence or expected occurrence of specified en-route weather phenomena which may affect the safety of low-level aircraft operations and which was not included in the forecast issued for low-level flights in the flight information region concerned or sub-are thereof.

SIGMET

SIGMET is defined as information issued by a meteorological watch office concerning the occurrence or expected occurrence of specified en-route weather phenomena which may affect the safety of aircraft operations. SIGMET SST is issued for transonic or supersonic flights.

SPECIAL AIR REPORT

The special air report is issued based on actual observations of given meteorological phenomena and no forecast is given.

The code name Speci designates aviation selected special weather reports. Criteria for the issue of a SPECI include changes in Wind, Visibility, Weather and Low Cloud, Both Metar and Speci messages make provision for a trend forecast at the end of the transmission

error: Content is protected !!