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11-29-2020, 01:03 AM
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#1
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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ID my depth transducer
My trawler has an ancient Furano LS 6100 display hooked to a transducer - pic attached. The display shows accurate depth and a steady 18kts of speed at the dock.
I snagged a Raymarine Axiom 7 from Defender for $400 & would love to ditch the Furano stuff and display depth on my fancy new chart plotter.
Can anyone tell me what I’ve got? Cable has “Airmar Transfucer Cable” printed on it but no other labels. I’m too chicken to pull it & couldn’t find any identifying marks on what is shown.
I’m getting my bilge cleaned on Monday and haven’t finished up my cable management project yet so don’t judge!
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11-29-2020, 01:20 AM
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#2
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Senior Member
City: La Conner, WA
Vessel Name: Carousel
Vessel Model: Bayliner 4788 (1998)
Join Date: Jun 2018
Posts: 249
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Check the other end of the cable to see if there is a marking there. It looks like my B744 transducer. Try Airmar for more info.
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11-29-2020, 01:30 AM
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#3
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by NWSeadog
Check the other end of the cable to see if there is a marking there. It looks like my B744 transducer. Try Airmar for more info.
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Thanks - couldn’t find a cable tag but will check again tomorrow.
All I really need is depth - might it be easier to get a Raymarine shoot through unit that plugs right into my Seatalkng backbone?
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11-29-2020, 06:01 AM
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#4
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,947
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There is usually a tag on the display end of the cable. Airmar makes the transducers for just about every manufacturer out there. They look the same only the connectors are different.
Airmar has an OEM Cross Reference. Can you also post a picture of the connector?
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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11-29-2020, 06:08 AM
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#5
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TF Site Team
City: Seneca Lake NY
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 7,808
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I had a similar experience trying to ID an old one.
Airman indicated they mark the xducer end.
I found a tag on mine about 6ft from the xducer hidden from view.
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
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11-29-2020, 09:49 PM
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#6
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by NWSeadog
Check the other end of the cable to see if there is a marking there. It looks like my B744 transducer. Try Airmar for more info.
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Thanks! Found it (6’ from the plug end) and you win the prize!
So now the question is how to get it onto my seatalkng backbone. Best I can tell I need an ITC-5, correct?
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11-29-2020, 10:54 PM
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#7
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,608
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Axiom can have built in sonar, or not. Depends upon the model. If it's built in it is setup for either CHIRP, downvision, or realvision transducer. If it's not built in you might need a CPxxx series sonar module and a Raynet cable. Raymarine makes a dizzying array of adapter cables.
Frankly I think it is easier and cheaper to just buy a new transducer and install it in the existing hole. Or epoxy the old hole and cut a new one. (2 3/8") Total cost of transducer is $150 (chirp) and you can get 0, 12, or 20 deadrise.
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11-29-2020, 11:38 PM
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#8
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by SoWhat
Axiom can have built in sonar, or not. Depends upon the model. If it's built in it is setup for either CHIRP, downvision, or realvision transducer. If it's not built in you might need a CPxxx series sonar module and a Raynet cable. Raymarine makes a dizzying array of adapter cables.
Frankly I think it is easier and cheaper to just buy a new transducer and install it in the existing hole. Or epoxy the old hole and cut a new one. (2 3/8") Total cost of transducer is $150 (chirp) and you can get 0, 12, or 20 deadrise.
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Thanks! I don’t need any of the fish finding stuff, just a plain old number for depth. I’d much rather spend $250 on an overpriced converter (ITC5) than haul the boat for another through hull. Swapping sensors is fine but it seems whatever I buy I’ll still need the ITC5? I don’t see anything that plugs right into a Seatalkng backbone. Would love to be wrong.
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11-30-2020, 12:00 AM
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#9
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,608
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does your Axion have built in sonar?
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11-30-2020, 12:21 AM
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#10
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Moderator Emeritus
City: Au Gres, MI
Vessel Name: Black Dog
Vessel Model: Formula 41PC
Join Date: Jul 2015
Posts: 21,129
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Airmar makes a splice box for when you have to cut the cable during the install. Maybe you could buy a cable for the Axiom and splice it to the transducer. You should call Airmar and ask them.
__________________
Boat Nut:
If you are one there is no explanation necessary.
If you aren’t one, there is no explanation possible.
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11-30-2020, 01:12 AM
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#11
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by SoWhat
does your Axion have built in sonar?
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No I don’t think so. Hasn’t arrived yet but it was really really cheap.
I’ll give Raymarine a call tomorrow I think.
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11-30-2020, 01:13 AM
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#12
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Veteran Member
City: Lake Barkley
Vessel Name: Osprey
Vessel Model: Mainship Pilot 30
Join Date: Aug 2020
Posts: 63
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When I purchased my new Garmin chart plotter, I was very confused as to which transducer would work best for my needs. As suggested above call Airmar. They are very helpful and will steer you in the right direction.
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11-30-2020, 11:25 AM
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#13
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Airmar advised me to call Raymarine, which advanced me to "tier 2 technical support" then put me on hold forever before the line was disconnected. I submitted a question online to them as well.
I'm amazed that this could be so complicated. Makes me want to just get a $100 shoot-through Hummingbird and glass over the through hull next haul-out.
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11-30-2020, 11:32 AM
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#14
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,947
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You can put an Airmar P79 shoot through the hull transducer that directly feeds an nmea 2000 backbone. No hole in the hull so no haul out. Assuming the raymarine uses nmea 2000.
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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11-30-2020, 12:46 PM
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#15
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,608
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Quote:
Originally Posted by High Wire
You can put an Airmar P79 shoot through the hull transducer that directly feeds an nmea 2000 backbone. No hole in the hull so no haul out. Assuming the raymarine uses nmea 2000.
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Not if the mfd is not equipped with sonar processing circuitry
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11-30-2020, 01:37 PM
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#16
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by SoWhat
Not if the mfd is not equipped with sonar processing circuitry
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I don't have RV or DV in the unit - so I think I can't just hook a transducer into SeaTalkNG; I think I need an ITC-5 or something that can interpret the signal from the device. Tried Defender & they couldn't help either.
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11-30-2020, 05:48 PM
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#17
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Guru
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,608
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Quote:
Originally Posted by socalrider
I don't have RV or DV in the unit - so I think I can't just hook a transducer into SeaTalkNG; I think I need an ITC-5 or something that can interpret the signal from the device. Tried Defender & they couldn't help either.
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Well something have to generate and process the sonar signal. If you don't have a transducer connector on the back of the mfd then the mfd is not capable of generating a signal. If it not internally supplied, then you would need an external sonar module. Guessing a CP470/CP570 Sonar module as they are the only 2 that will work with Lighthouse III. The module communicates with the mfd via Raynet.
If your mfd does has a chirp transducer connector then it is generating a signal. You would simple need an adapter to convert the Raymarine 9 pin to the airmar 7 pin (or whatever it is) Note the Axiom may be putting 1000W out and your airmar may only be 500W. SOmething to check on.
If you are stilling using Lighthouse II then you may have more options. I am not that familiar with Axiom so I would recommend contacting a Raymarine installer.
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11-30-2020, 06:12 PM
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#18
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Guru
City: Cape May, NJ
Vessel Name: Irish Lady
Vessel Model: Monk 36
Join Date: Dec 2007
Posts: 4,947
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Quote:
Originally Posted by SoWhat
Not if the mfd is not equipped with sonar processing circuitry
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The P79 just outputs an NMEA digital depth sentence reading about 1/second. It is a number sent to the mfd just like speed or COG. Not a fishfinder graph type video display. I have a P79 NMEA 0183 type now connected to my Garmin 5212.
__________________
Archie
Irish Lady
1984 Monk 36 Hull #46
Currently in Cape May, NJ
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11-30-2020, 07:52 PM
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#19
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by High Wire
The P79 just outputs an NMEA digital depth sentence reading about 1/second. It is a number sent to the mfd just like speed or COG. Not a fishfinder graph type video display. I have a P79 NMEA 0183 type now connected to my Garmin 5212.
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Yeah I just want the depth number. Seems I should be able to buy a Raymarine brand P79 for $150 or so and plug it into the SeaTalkNG network. But damned if I can find anyone to confirm that. Still baffled at why it's so hard to figure this out.
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12-01-2020, 03:50 PM
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#20
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Guru
City: San Diego
Vessel Name: SEA WOLF
Vessel Model: 1979 CHB 41 Trawler
Join Date: Feb 2020
Posts: 996
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Quote:
Originally Posted by socalrider
Yeah I just want the depth number. Seems I should be able to buy a Raymarine brand P79 for $150 or so and plug it into the SeaTalkNG network. But damned if I can find anyone to confirm that. Still baffled at why it's so hard to figure this out.
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OK finally got through to Raymarine. Here's the answer in case anyone wants to know:
Not possible to interface a depth transducer directly to MFD (as So What stated) unless it's equipped with a sonar interface. Instead, I'd need to plug it into an I40, I50, or I60 depth display, which in turn could be interfaced via SeaTalkNG network. So a $350 display plus a $150 transducer minimum.
Tempted to just get a Hummingbird shoot through for $100 and be done with it. Something to be said for simple, non-integrated systems I think.
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