Zones de contrôles océaniques de l'Atlantique Nord.
Federal Aviation Administration
2007-01-01
<a rel="nofollow" class="external free" href="https://www.faa.gov/about/office_org/headquarters_offices/avs/offices/afs/afs400/afs470/media/NAT.pdf">https://www.faa.gov/about/office_org/headquarters_offices/avs/offices/afs/afs400/afs470/media/NAT.pdf</a>