MWARA

From HFUnderground

Major World Air Route Area (MWARA) Frequencies

See: list of MF and HF aeronautical band HF aircraft bands

Vast areas of the world lack the necessary VHF airband communication systems needed to provide reliable radio coverage between aircrews and air traffic controllers. This lack of VHF coverage is generally due to their remote locations - for example much of the airspace over the Atlantic and Pacific oceans. To compensate for this lack of VHF coverage a group of HF Frequencies has been allocated. Each set of frequencies are often referred to as 'families'. Aircraft flying over the major ocean routes often use a combination of HF SSB voice radio, SATVOICE, the ACARS datalink system to communicate with air traffic control and regular VHF aircraft radio to communicate with other aircraft flying at high altitudes. Over the Atlantic and Pacific, the most common frequency for air to air (or "interplane") communications is the so-called "fingers" frequency 123.45 MHz AM. 123.45MHz is designated Pacific Air-to-Air as well as Atlantic Air-to-Air.

• NAT - North Atlantic Communications Frequencies
• 2872 kHz
• 2889 kHz
• 2962 kHz
• 2971 kHz
• 3016 kHz
• 3476 kHz
• 4675 kHz
• 5598 kHz
• 5616 kHz
• 5649 kHz
• 6622 kHz
• 6628 kHz
• 8825 kHz
• 8831 kHz
• 8864 kHz
• 8879 kHz
• 8891 kHz
• 8906 kHz
• 11279 kHz
• 11309 kHz
• 11336 kHz
• 13291 kHz
• 13306 kHz
• 17946 kHz

• NAT - North Atlantic VOLMET - Aviation Weather Broadcast Frequencies
• 3485 kHz
• 6604 kHz
• 10051 kHz
• 13270 kHz

• CAR - Caribbean Communications Frequencies
• 2887 kHz
• 3455 kHz
• 5520 kHz
• 5550 kHz
• 6577 kHz
• 6586 kHz
• 8846 kHz
• 8918 kHz
• 11387 kHz
• 11396 kHz
• 13297 kHz
• 17907 kHz

• SAT - South Atlantic Communications Frequencies
• 2854 kHz
• 2935 kHz
• 3452 kHz
• 5565 kHz
• 6535 kHz
• 8861 kHz
• 11291 kHz
• 13315 kHz
• 13357 kHz
• 17955 kHz

• SAM - South America Communications Frequencies
• 2944 kHz
• 3479 kHz
• 4669 kHz
• 5526 kHz
• 6649 kHz
• 8855 kHz
• 10096 kHz
• 11360 kHz
• 13297 kHz
• 17907 kHz

• SAM - South America VOLMET - Aviation Weather Broadcast Frequencies
• 2881 kHz
• 5601 kHz
• 10024 kHz
• 10087 kHz
• 13279 kHz

• EUR - Europe Communications Frequencies
• 3479 kHz
• 5661 kHz
• 6598 kHz
• 10084 kHz
• 13288 kHz
• 17961 kHz

• EUR - Europe VOLMET - Aviation Weather Broadcast Frequencies
• 3413 kHz
• 5505 kHz
• 8957 kHz
• 13264 kHz

• NCA - North Central Asia Communications Frequencies
• 3004 kHz
• 3019 kHz
• 4678 kHz
• 5646 kHz
• 5664 kHz
• 6592 kHz
• 10096 kHz
• 13303 kHz
• 13315 kHz
• 17958 kHz

• NCA - North Central Asia VOLMET - Aviation Weather Broadcast Frequencies
• 4663 kHz
• 10090 kHz
• 13279 kHz

• MID - Middle East Communications Frequencies
• 2944 kHz
• 2992 kHz
• 3467 kHz
• 3473 kHz
• 4669 kHz
• 5658 kHz
• 5667 kHz
• 6625 kHz
• 6631 kHz
• 8918 kHz
• 8951 kHz
• 10018 kHz
• 11375 kHz
• 13288 kHz
• 13312 kHz
• 17961 kHz

• MID - Middle East VOLMET - Aviation Weather Broadcast Frequencies
• 2956 kHz
• 5589 kHz
• 8945 kHz
• 11393 kHz

• AFI - Africa Communications Frequencies
• 2851 kHz
• 2878 kHz
• 3149 kHz
• 3425 kHz
• 3467 kHz
• 4657 kHz
• 5439 kHz
• 5652 kHz
• 5658 kHz
• 6559 kHz
• 6574 kHz
• 6673 kHz
• 8894 kHz
• 8903 kHz

• AFI - Africa VOLMET - Aviation Weather Broadcast Frequencies
• 2860 kHz
• 5499 kHz
• 10057 kHz
• 13261 kHz

• INO - Indian Ocean Communications Frequencies
• 3476 kHz
• 5634 kHz
• 8879 kHz
• 13306 kHz
• 17961 kHz

• EA - East Asia Communications Frequencies
• 3016 kHz
• 3485 kHz
• 3491 kHz
• 5655 kHz
• 5670 kHz
• 6571 kHz
• 8897 kHz
• 10042 kHz
• 11396 kHz
• 13297 kHz
• 13303 kHz
• 13309 kHz
• 17907 kHz

• EA - East Asia VOLMET - Aviation Weather Broadcast Frequencies
• 3458 kHz
• 5673 kHz
• 8849 kHz
• 13285 kHz

• SEA - South East Asia Communications Frequencies
• 3470 kHz
• 3485 kHz
• 5649 kHz
• 5655 kHz
• 6556 kHz
• 8942 kHz
• 10066 kHz
• 11396 kHz
• 13309 kHz
• 13318 kHz
• 17907 kHz

• SEA - South East Asia VOLMET - Aviation Weather Broadcast Frequencies
• 2965 kHz
• 6676 kHz
• 11387 kHz

• CWP - Central West Pacific Communications Frequencies
• 2998 kHz
• 3455 kHz
• 4666 kHz
• 5652 kHz
• 5661 kHz
• 6532 kHz
• 6562 kHz
• 8903 kHz
• 10081 kHz
• 11304 kHz
• 13300 kHz
• 17904 kHz

• CWP - Central West Pacific VOLMET - Aviation Weather Broadcast Frequencies
• 2863 kHz
• 6679 kHz
• 8828 kHz
• 13282 kHz

• NP - North Pacific Communications Frequencies
• 2932 kHz
• 5628 kHz
• 6655 kHz
• 6661 kHz
• 10048 kHz
• 11330 kHz
• 13300 kHz
• 17904 kHz

• CEP - Central East Pacific Communications Frequencies
• 2869 kHz
• 3413 kHz
• 4657 kHz
• 5547 kHz
• 5574 kHz
• 6673 kHz
• 8843 kHz
• 10057 kHz
• 11282 kHz
• 13300 kHz
• 17904 kHz

• SP - South Pacific Communications Frequencies
• 3467 kHz
• 5559 kHz
• 5643 kHz
• 8867 kHz
• 10084 kHz
• 11327 kHz
• 13300 kHz
• 17904 kHz

• Worldwide Frequencies - International Aircraft Search and Rescue
• 2182 kHz USB
• 3023 kHz USB
• 5680 kHz USB
• 8364 kHz USB

Note: the search and rescue (SAR) emergency frequencies are used by and for other services, including the HF maritime mobile service (2-30 MHz HF SSB marine radio). The VHF Guard frequency of 121.5 MHz and the UHF Guard frequency of 243.0 MHz both still apply, see also: VHF marine band frequencies. 123.45 MHz is also heavily used for air to air communications in some busy areas i.e. the North Atlantic Track system area with heavy traffic.

For worldwide listing by families with maps, see the Atlantic page on the Collins website for the Atlantic routes, and for the Pacific, polar and Mexican routes see the Pacific, Polar and Mexican page from the Collins website. These pages also contain charts with up to date LDOC (Long Distance Operational Control) frequencies.

Radio communications range - planning range. Note that the 10 MHz and above frequencies are generally used during daytime only, and frequencies below 5 MHz are generally used during night time only. The 5-10 MHz region is used 24 hours a day. Frequency usage, noise levels, propagation conditions and interference may result in use of alternate frequencies.

• 2 MHz band / 3 MHz band: Day: 100 km / 60 miles
• 2 MHz band / 3 MHz band: Night: 500 km / 300 miles
• 4 MHz band: Day: 350 km / 215 miles
• 4 MHz band: Night: 1400 km / 870 miles
• 5 MHz band: Day: 450 km / 280 miles
• 5 MHz band: Night: 1800 km / 1120 miles
• 6 MHz band: Day: 650 km / 400 miles
• 6 MHz band: Night: 2200 km / 1350 miles
• 8 MHz band / 9 MHz band: Day: 1000 km / 600 miles
• 8 MHz band / 9 MHz band: Night: 3400 km / 2100 miles
• 10 MHz band: Day: 1250 km / 775 miles
• 11 MHz band: Day: 1500 km / 930 miles
• 13 MHz band: Day: 2000 km / 1200 miles
• 17 MHz band - 18 MHz band: Day: 2600 km / 1600 miles

For an easier to read chart of frequencies, see the MWARA article on the RadioReference wiki (note: offsite wiki)