They are not "normal" FM transmissions. AIS uses an emission designator of 16K0FD. More specifically, a 9.6kbps GMSK FM modulation using HDLC packet protocols.
Almost everything you need to know is right here: http://www.navcen.uscg.gov/enav/ais/default.htm Scott --- In digitalradio@yahoogroups.com, "Andrew O'Brien" <andrewob...@...> wrote: > > Thanks Dave, is it via some sort of data burst? > > On Wed, Jul 29, 2009 at 10:30 AM, nf2g <d...@...> wrote: > > > > > > > All emissions on those channels are FM. > > > > 73 de Dave, NF2G > > > > __._, > > >
