I am investigating the possibility for using paddle speed transducer. There is Analog version of DST800 available. The specification are saying it is only for Raymarine ST60 but as I remember on my previous boat all this was analog to the instrument and then it was converted in to seatalk. Have any one used this transducer to connect to B@G Hydra 2000? 
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Slavko
SM 2000
#279