Re: VHF DSC Monitoring

Richard Ware <richardjware@...>

On Fri, 26 Jul 2019 at 10:24, Jay Law <> wrote:

Hi All

As I'm new to DSC and it wasn't invented when I was at sea....what software do you use to monitor 156.525?


Likewise, this DSC malarkey wasn't around when I was at sea. Happiness
was a Marconi Argonaut (the old one, not the SP version). About the
size of the average shed door (and just about about as sensitive)

I'm using the COAA DSC decoder software for VHF DSC

The receiver is an ICOM IC-R6 handheld scanner and the antenna is
actually a home-brew VHF dipole for the airband, fed via a
multi-coupler to 5 receivers, of which the ICR-6 is one.

I've also used SeaTTY from the DXSoft website. On MF and HF, SeaTTY is
very sensitive and frequently picks up more error-free messages than
YADD and the COAA decoder but on VHF I find the converse is true. If
for example Solent CG sends an all-ships 'squirt' on Ch70 from each of
its remote sites, DSC decoder will pick up the lot but SeaTTY may only
get say 2 or 3 out of 5 so I've stopped using it.

Bear in mind that YADD doesn't cover VHF due to the different protocol

I'm located on the Dorset/Wiltshire/Somerset border. I can get good
signals from Solent and MIlford Haven CG, and Falmouth at a pinch, and
it doesn't take much in the way of lift conditions for Jobourg and
Gris Nez to manifest themselves, especially around 0500 and 0600 when
they do self-tests

It's all good stuff


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