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Old 01-12-2011, 11:22   #1
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Instruments / Gauges

On a 21 ft catamaran how would you install a depth finder/ speed odometer? Do they make a wireless ones i just dont know how this will work if one hull is out of the water?
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Old 01-12-2011, 13:25   #2
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Re: Insturments / gages

Hi SonOfASailor:
Neither would work when that hull is out of the water. I think you'd be best off with a little gps chartplotter, which would show and record your true speed and would have the charts to keep you away from shoals. That's what I used with my Windrider Trimaran.
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Old 01-12-2011, 13:51   #3
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Re: Insturments / gages

Quote:
Originally Posted by son_of_a_sailor3 View Post
On a 21 ft catamaran how would you install a depth finder/ speed odometer? Do they make a wireless ones? I just don't know how this will work if one hull is out of the water.
The only way I can think of to reliably get depth or speed-through-the-water on a boat that can fly a hull is to have sensors in both hulls or have a sensor pod that you can move to the downwind hull. Another possible option is to build a sensor-pod that is always in the water, between the hulls, but now we're getting really klugy...
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Old 02-12-2011, 07:17   #4
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Re: Insturments / gages

Hand held GPS and hand held sounder
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Old 03-12-2011, 19:31   #5
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Re: Instruments / Gauges

yes maybe a Handheld is better, but i thought someone told me there is a wireless dept instrument , but maybe just knowing the waters i am in too helps.. thanks
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Old 03-12-2011, 21:43   #6
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Re: Instruments / Gauges

Even a "wireless" transducer needs to get power somehow, so they're not really wireless.

B&G H3000 system has a provision for using two speed transducers. I'm not sure about the depth.

It would seem that a 21' catamaran would need only a few inches of water to float--do you really need a depthfinder? As others have suggested, a handheld chartplotter with charts for your area may be all you need.
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Old 04-12-2011, 07:13   #7
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Re: Instruments / Gauges

well i have 2 dagger boards that drop almost 4 ft. but i guess if i am coming into shore i would just pull both up! but it would be nice if i go to a lake that i dont know the waters having a depth gauge would be some what a benefit i guess.. I know if i am moving at 15knts i am sure i dont want to hit anything!
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