Pirate stations in North America use this band also, the calling frequency being 3475 kHz. Some military stations use this band also, but activity is light. This range is used for civil aeronautical communications in USB. Several fixed stations also use this range, including several associated with various agencies of the U.S. Canadian standard time and frequency station CHU can be heard on 3330 kHz. This is the 90-meter broadcasting band, used mainly by stations in the tropics. This range is allocated to fixed stations, with most communications in RTTY. Several stations broadcasts aeronautical weather bulletins, and you can also hear traffic between airports and airplanes aloft. Mainly aeronautical stations in USB use this band. More maritime stations are found here, as well as standard time and frequency stations WWV and WWVH on 2500 kHz. You may also hear illegal marine stations in this band, in USB mode. In North America, this band is also used by government stations. This is the 120-meter broadcasting band, mainly used by stations located in the tropics. The frequency of 2670 kHz is used by the Coast Guard for informational broadcasts. Most activity will be in USB, and best reception is at night. There are also several regularly scheduled maritime weather broadcasts by Coastal Radio stations. This range is used maritime communications, with 2182 kHz reserved for distress messages and calling (DCS calling: 2187.5 kHz). Most voice communications will be in LSB and AM with best reception at night during the fall and winter months. Most two-way communications in this band is USB. Best time to listen would be during the nighttime hours. In Europe you can hear Coastal Radio stations in this band. You may hear several transmitters that sound like chirping crickets these are floating beacons used to mark fishing and offshore oil exploration locations. This is a "grab bag" of miscellaneous radio communications, mainly beacons and navigation aids. In Europe you can hear medium wave pirate radio stations in this band. New stations began appearing here in late 1997, and this new "X band" is providing excellent DX listening opportunities. In USA the Medium wave Broadcast band now ends at 1700 kHz, with 1610 to 1700 kHz being the new "X" or "extended" band. Many powerful stations in South America use a non-standard frequency step in this band. In the United States, the frequencies of 1230, 1240, 1340 1400, 1450, and 1490 kHz are allocated only for local stations (low power) and you may simply hear a 'rumble' on those frequencies, esp. The channel separation is 9 kHz in Europe, Africa and Asia, and 10 kHz in the Americas. This is the Medium wave Broadcast band (also known as the "AM" broadcasting band).
The old international distress frequency of 500 kHz is in this band, but it is no longer officially used. Your best reception here will be at night, especially during the fall and winter months. Marine weather and safety broadcasts, known as NAVTEX, are transmitted on 518 kHz. Some RTTY signals are found in the upper end of this band. These stations can be found locally, with some DX heard at night. Most stations heard in this range are aeronautical and marine navigation beacons that continuously repeat their call signs in Morse code. This is the European Long wave Broadcast band.