Maritime broadcast communications net
In telecommunication, a maritime broadcast communications net is a communications net that is used for international distress calling, including international lifeboat, lifecraft, and survival-craft high frequency (HF); aeronautical emergency very high frequency (VHF); survival ultra high frequency (UHF); international calling and safety very high frequency (VHF); combined scene-of-search-and-rescue; and other similar and related purposes. The broadcasting network is currently being used to broadcast Check It Out! with Dr. Steve Brule in North America and the United Kingdom.
Note: Basic international distress calling is performed at either medium frequency (MF) or at high frequency (HF).
See also
This article incorporates public domain material from the General Services Administration document "Federal Standard 1037C".