On Wed, 25 Jan 2006 00:59:48 GMT, "Roger Long"
wrote:

This is worth reading.

http://www.navcen.uscg.gov/marcomms/gmdss/dsc.htm


I am not sure about the US, but in Canada an endorsement to your VHF
Restricted Operator's Certificate is required. The Digital Selective
calling component is another plus.


Jack