Wikipedia
METAREA
METAREAs are geographical sea regions for the purpose of coordinating the transmission of meteorological information to mariners on international voyages through international and territorial waters. These regions are part of the Global Maritime Distress Safety System. The regions are identical to NAVAREAs which are used to coordinate the transmission of navigational hazards to the same mariners. Mariners receive the meteorological and navigational information via NAVTEX. The Joint WMO/IOC ( Intergovernmental Oceanographic Commission) Technical Commission for Oceanography and Marine Meteorology is the responsible agency for the coordination of the dissemination of this information for METAREAs and NAVAREAs.