BOAC, tks:
FL 100
http://www.tc.gc.ca/media/images/ca-...m6_6_2a_en.gif
FL 200
http://www.tc.gc.ca/media/images/ca-...m6_6_2b_en.gif
FL 300
http://www.tc.gc.ca/media/images/ca-...m6_6_2c_en.gif
HF
Family A 3 016 kHz 2030Z–0830Z
5 598 kHz 2030Z–0830Z
8 906 kHz 0830Z–2230Z
13 306 kHz 1230Z–1830Z
Family B 2 899 kHz 2030Z–0830Z
5 616 kHz 24-hr service
8 864 kHz 0830Z–2230Z
13 291 kHz 1000Z–2000Z
Family C 2 872 kHz 2030Z–0830Z
5 649 kHz 24-hr service
8 879 kHz 0830Z–2230Z
11 336 kHz 1030Z–1830Z
Family D 2 971 kHz 2030Z–0830Z
4 675 kHz 2030Z–0830Z
8 891 kHz 24-hr service
11 279 kHz 1030Z–1830Z
Family E 2 962 kHz unavailable
6 628 kHz unavailable
8 825 kHz unavailable
11 309 kHz unavailable
13 354 kHz unavailable
17 946 kHz unavailable
Family F 3 476 kHz 2030Z–0830Z
6 622 kHz 1130Z–0730Z
8 831 kHz 0830Z–2230Z
6.6.1 NAT and Anchorage Arctic Regions-SATCOM Voice Use
SATCOM voice may be used to contact Gander Radio for non-routine flight safety calls or during periods of poor HF propagation. Gander Radio may be contacted using Inmarsat short code 431613.
6.6.2 NAT Region-VHF Coverage
VHF Frequencies
126.9 (45N050W – 51N050W)
126.9 (CYFB) (61N070W – 67N070W)
127.1 (48N050W – 54N050W)
122.375 (45N050W – 54N050W)
127.9 (57N–63N040W – 57N–61N050W)
NOTE: Notwithstanding the foregoing,
aircraft may proceed across the Atlantic without HF radio subject to the following restrictions:
below FL195, routing Iqaluit (Frobay) – Sondre Stromfjord – Keflavík; and
FL250 or above, routing Goose VOR – Prins Christian Sund (or Narsarsuaq) – Keflavík. The aircraft is not allowed to operate in MNPS airspace unless MNPS authority is held.
Source:
COM - 6.0 AERONAUTICAL FIXED SERVICES ? INTERNATIONAL FLIGHTS - Transport Canada