Join Date: Jun 2014
Location: Florida West Coast
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Re: Airmar / Raymarine DST800 Transducer Issue
Just circling around to post the final solution that works for me, remembering I'm the guy who is NOT going to "just go sailing" for 6 months at a time with a system designed to allow a 17 in. geyser to enter my boat for any reason.
I replaced the DST800 triducer with individual speed and depth ducers. Depth is the DT800, which is the same diameter as the triducer, so it nicely plugs the geyser thru-hull and it will only be removed to refresh the anti-fouling paint as needed. Speed is the ST800, with a smaller diameter like the original analog unit that came with my OEM Raymarine instruments. This required the installation of an additional thru-hull. To be fair to AirMar, they acknowledged my dissatisfaction with their design and helped accomodate my change of equipment.
I am very pleased with the results. When pulling the speed ducer the water entry is very minor, 2-3 in height, which is very similar to what I experienced with my OEM setup. Less than 4 oz of water enter during the swapover and no water on the sole. What doesn't drain to the bilge is quickly wiped up with a towel.
That's it, adios, its time to go sailing.