wrote in message
...
On Mon, 28 Sep 2009 09:39:08 +0200, Marc Heusser
d wrote:

In article ,
"Denis M" wrote:

After this summer cruise I concluded that I needed to replace my radar
reflector.

An active one will work wonders.
And (active) AIS is an even better option, provided you are aware that
only vessels over 500 tons are mandatorily fitted with one. This will
even give you the equivalent of MARPA.

HTH

Marc

Those big boats can (and do) filter out all signals from AIS-B
transponders to reduce clutter on their display. You may see them, but
they still don't see you.

Very true, when a target is showing on the radar. I use MARPA's
information and contact the vessel with DSC. This way (hopefully) the
vessel or radar base can identify me with my MMSI number and get my GPS
position on their screen. In theory this is how it should work. I practice
it's a difference story. Most of the foreign ships have not had their
personnel trained to use DSC yet!

When practicing with friend I can track their GPS positions and they can
track me without problems.