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Date Posted: - Thursday - 06/20/13 - 10:15pm
Author: Jared Kibele
Subject: Airmar P79
In reply to: Caleb 's message, "Mariner 31 Hull thickness" on - Monday - 06/10/13 - 10:18pm

I installed an Airmar P79 in Architeuthis (M31 Hull #9). I put it under the port settee. The hull seemed a bit too steep under the v-birth. Mine is hooked up to a Garmin chart plotter via the Garmin GSD22 sounder. It works great. Nice detailed returns off the bottom. It's easy to tell sand from rock and to see kelp on rocks. Maximum sensible depth seems to vary a bit but it'll generally work down to at least 500 feet. I've seen 700 or more at times.

I measured the hull thickness at one point a long time ago while replacing a through-hull fitting. I can't remember exactly what the measurement was but it was significantly less the 5/8". ...and anyway, the transducer works great where I put it.

...this is so obvious that I hesitate to even mention it but... You don't want to put it on any of the horizonal surfaces under the cabin sole. Those are either on top of the ballast or, in the aft part behind the ballast, probably too thick and generally covered in nasty bilge water anyway. Or, if in front of the ballast, right over the stem where the glass is super thick.

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[> [> Thanks -- Caleb, - Monday - 06/24/13 - 2:36am

Awesome, that was exactly the setup I was looking at installing.

Thanks heaps.

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