Live NAT and Weather Maps:
Live Atlantic ATC Radio Streams:
FAA Regulation on position report contents and frequency: CFR Part 101.39
RVSM Levels: FL 310 to FL430 Oceanic controlled airspace: FL55 to FL600
NAT TRACKS message time of publication of the day-time OTS is 2200 UTC and of the night-time OTS is 1400 UTC.
Classified as a Medium Unmanned Free Balloon2), having a total of 5.4kg payload as two packages.
Wikipedia General Introduction to NAT
ICAO NAT MNPS Operating Handbook 2009 for the information of pilots and dispatchers planning and conducting operations in North Atlantic (NAT) Minimum Navigation Performance Specifications (MNPS) Airspace.