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Catalina/Capri 25/250 Sailor's Forums

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Raymarine tridata? Opinions??

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Captnkev25
1st Mate

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USA
36 Posts

Initially Posted - 04/25/2011 : 06:42:24

I friend of mine has a never used Raymarine tridata with transducers and a garmin 19hvs gps antenna that he has offered to me for $475. He will also install it for me for free. He purchased it about a year ago for a boat that he wound up selling. I have the old Signet marine units right now (depth and speed) and neither of them is working. He explained to me that with the GPS antenna I could tell my speed over ground instead of my apparent speed with the current passing over the paddlewheel as well as the boats motion. I know that the price is a good one especially since he will be installing it with me. My real question is are these good units and also is the antenna necessary since I don't have an actual gps.

Kevin (1984 C25 Standard Rig, Swing Keel, Traditional Interior)

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britinusa
Web Editor

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USA
5404 Posts

Response Posted - 04/25/2011 : 19:41:54

We have the Raymarine ST40 system (Tridata for Speed, Depth, Temp) and the ST40 Wind data system.

The ST40 Tridata system works really well. Consists of a pair of transducers in the well under the V-Berth.

The ST40 Wind data system works well, but the issue we have is the thickness of the electrical wires from the masthead transducer to the meter. The wire are stupidly thin and we repair them almost every trip out!

We have the wind meter mounted on the stbd cabin aft bulkhead facing the helm. The Tridata display is mounted at the helm on the Pedestal.

Paul
Paul

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Dave5041
Former Mainsheet Editor

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USA
3758 Posts

Response Posted - 04/25/2011 : 20:26:30

Reliable performance from my old ST-40 Bi-data units - wind and speed/depth (with log and temp)

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TakeFive
Master Marine Consultant

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2272 Posts

Response Posted - 04/26/2011 : 04:27:34

You may have some model numbers wrong. A Google search of Raymarine ST40 Tridata yielded no hits - only "Bidata" was available. Ditto for Garmin 19hvs - the only hits on that were the messages you posted here and elsewhere.

I have the Garmin 18x LVC, which is a simple puck that spits out NMEA through a wire. You will need some way to display its output (it's doubtful that it can feed directly into Raymarine's Seatalk system without a converter, though some Raymarine devices do actually have NMEA input terminals). But there are several very useful things that you can do with it:

<ul><li>If you have a fixed-mount VHF with DSC (all new radios in the US are required to have this), you should connect the NMEA output to the radio, because it enables your radio to automatically send your position out with all DSC calls and distress calls (!). This is a very useful safety feature.</li><li>Also, you could connect the GPS to a laptop or tablet (usually with a serial-USB converter, though I have it going out via Bluetooth) to display in chart plotter software.</li></ul>

A single NMEA device can typically talk to three different listeners, so you can do both of these things by simply splitting the wire. There's no need for a multiplexer to do this if you're using NMEA compatible devices.

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britinusa
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USA
5404 Posts

Response Posted - 04/26/2011 : 07:00:10

Rick is correct regarding 'TriData', although the ST40 is named as a BiData, it provides Speed, Depth and Water Temp (plus a load of features like depth alarms, etc.)

Paul.

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Prospector
Master Marine Consultant

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Canada
3159 Posts

Response Posted - 04/26/2011 : 07:07:33

How do you use your boat, and why do you want wind gauges?

we no longer have wind instruments, and don't miss them.

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Joe Diver
Master Marine Consultant

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USA
1218 Posts

Response Posted - 04/26/2011 : 07:29:39

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Prospector
 How do you use your boat, and why do you want wind gauges?

we no longer have wind instruments, and don't miss them.
<hr height="1" noshade id="quote"></blockquote id="quote">

I only have a Windex, but I don't look at it much. I just feel the wind, true when I'm stopped and apparent when I get going, and trim according to the telltales.. As far as speed, I just use a couple of iPhone apps...I realize it's speed over ground, but in a lake with little to no current, that doesn't matter.

The first sailboat I piloted, a C36 that got me into sailing, had the nice pod of instruments on it's pedestal. They're nice to have for sure. I have a Uniden depth sounder that I have yet to install. There are 2 non-functional instruments on my boat, a knotmeter and apparent wind guage (no mast top). I'm going to remove them, make a nice teak plate to cover the holes and put my Uniden and a compass in there.

Capt Kev, sounds like you have a good deal working....I'd go for it if it were offered to me, but I'm also a cheap bastage and would try to get him to drop the price with the promise of beer and a nice dinner.

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TakeFive
Master Marine Consultant

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2272 Posts

Response Posted - 04/26/2011 : 07:35:04

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Joe Diver
 
...I have a Uniden depth sounder that I have yet to install. There are 2 non-functional instruments on my boat, a knotmeter and apparent wind guage (no mast top). I'm going to remove them, make a nice teak plate to cover the holes and put my Uniden and a compass in there...<hr height="1" noshade id="quote"></blockquote id="quote">
Before you invest too much work installing the compass right next to the depth meter panel, verify that the panel does not cause an unacceptably high level of magnetic interference with the compass. I'm no expert, but I always thought that is why the instrument pods are usually a foot or more above a pedestal compass.

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Captnkev25
1st Mate

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USA
36 Posts

Response Posted - 04/26/2011 : 07:44:38

Lol I hear that Scott. That's already worked into the payment. I'm a bay sailor in the Great South Bay of Long Island so this unit may be a bit of an overkill for me but I won't be adding wind instruments anytime soon. My general school of thought is that I can replace ONE signet marine instrument for $414.95 plus shipping or spend an extra $50 and have a newer style unit that has multiple capabilitys and would replace BOTH my non working knot meter and my non working depth finder. The GPS receiver is just an add on that this guy has bundled into the sale. I may not have use for it at the moment but may eventually add a GPS or I can sell or trade it for something I do want/need. The unit is a Raymarine st60+ with the transducers and the receiver is a Garmin 17 hvs. I may just get a cheap netbook and some GPS software to use with it.

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Joe Diver
Master Marine Consultant

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USA
1218 Posts

Response Posted - 04/26/2011 : 07:55:58

Good advice Rick..thanks. I'll mount up the sounder first then experiment with the compass before I do a permanent install.

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Prospector
Master Marine Consultant

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Canada
3159 Posts

Response Posted - 04/26/2011 : 09:45:22

Our sounder and compass are about 4" apart on the port bulkhead. So far no worries.

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Captnkev25
1st Mate

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USA
36 Posts

Response Posted - 05/03/2011 : 11:02:06

Ok just spoke to the guy. Apparently the unit he has is a Raytheon Raydata. It is unused but has been retired by Raymarine. Still a good deal??

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