NMEA...

[Drinky Crow]

...is NMEA is NMEA is NMEA amiright?

My plotter is B&G but I can't get one of these...


...in time but can source this Garmin/Airmar locally...


They're both DST 810 so plug and play?

Frankly I can't figure how the B&G is installed. I get the other one, insert from bottom thread nut from top. But what the deuce is with B&G unless they're not showing all the mounting bits.

[Hartleyg]

The top picture is the insert, while the bottom picture includes the thru-hull. If you already have the correct thru-hull, then all you need is the insert (which goes in from the top/inside)


Hartley
S/V Atsa

[nigel1]

As far as I am aware, the B&G speed and depth transducers are made by Airmar, mine certainly are, the cables are marked "Airmar"
The Airmar and B&G housings should be the same, so it would be a matter of just replacing the insert.

[Drinky Crow]

Ok thanks guys, there's an old Raymarine (I think) stand alone depth in there now, so I was thinking I'd have to pull it all out and re-caulk anyways.

[Drinky Crow]

So, sounder is Raytheon, transducer Airmar. Though there doesn't seem to be any kind of fastener holding it in the through hull.
Maybe the former owner glued it. Threads look of through hull look painted. Might be ordeal installing new insert probably should pop out the old through hull and start over.

[JBP]

Most of the big names all use Airmar transducers and they often fit in the same through hull. If you already have the ubiquitous plastic through hull tube and it is in good shape, you can use it. There is normally a big nut holding the transducer in the through hull. The newer through hull tubes have the nifty flappy valve so you can pull the transducer while in the water with less panic.

[Drinky Crow]

Originally Posted by JBP

The newer through hull tubes have the nifty flappy valve so you can pull the transducer while in the water with less panic.

That right there is reason enough to buy new. Thanks.

[wholybee]

Originally Posted by Drinky Crow

So, sounder is Raytheon, transducer Airmar. Though there doesn't seem to be any kind of fastener holding it in the through hull.
Maybe the former owner glued it. Threads look of through hull look painted. Might be ordeal installing new insert probably should pop out the old through hull and start over.

Speed transducers are removable so you can clean out the paddlewheel. Depth generally are not.

[Hartleyg]

A DST810 has depth, speed and temp in one insert. In the OP pictures, the top unit (without the thruhull) the ribbed ring toward the top is a nut that holds the insert into the thruhull. Its in the lower picture as well, screwed into the top of the thruhull.
If your unit doesn't have this ring, then the OO probably stuck it in there with some goo (or whatever). You could try yanking it out (preferably on the hard!) but the right move might be a 100% replacement. If the existing thruhull is bronze, then it might be worth the effort to remove the existing sensor and clean the thruhull out.


BTW, NMEA has nothing to do with it - NMEA has two networking protocols in general use: NMEA-0183, which is the older, slower format with both transmitting and receiving ports on equipment, with corresponding wires running around. NMEA2000 is the newer, higher-speed protocol (it uses the same networking system newer vehicles have) with specific connectors and requirements like terminating resistors at each end. Neither has anything to do with the wiring between the Depth/Speed/Temp sensor and the instrument that reads out the values.


GL!

Hartley
S/V Atsa

[stevead]

Sometimes you follow a post, astonished with the misinformation that is posted in response to a question that lacks clarity and can only wait for the potential train wreck that is about to follow.

BTW, NMEA has nothing to do with it.....Neither has anything to do with the wiring between the Depth/Speed/Temp sensor and the instrument that reads out the values.

What a bunch of bollocks. If the transducer is either NMEA 0183 or NMEA 2000 then the cable coming from the transducer will be designed either for NMEA 0183 or NMEA 2000 and terminated with a connector as appropriate. In the case of NMEA 2000 it will generally be a Micro-C connector (M12) designed to plug into the NMEA 2000 backbone. For NMEA 0183 it will either be terminated with bare wires or with a proprietary connector designed for a specific manufacturer's instrument display or multi-function display. Similarly analog sensors will be terminated with a connector designed for a specific manufacturer.

Speed transducers are removable so you can clean out the paddlewheel. Depth generally are not.

Most depth transducer designed for a through hull fitting can be removed. Depth transducers designed for in-hull fitting (secured inside the hull) usually cannot be easily removed as they are fitted inside a base filled with something like anti-freeze or a potting compound.

Most of the big names all use Airmar transducers and they often fit in the same through hull

While most manufacturers source their transducers from Airmar, different OEM versions are often designed with different through-hull fittings which may not be interchangeable (especially the locking rings) and in the case of analog or NMEA 0183 transducers may be fitted with proprietary connectors

My plotter is B&G but I can't get one of these...

What model of B&G plotter do you have ? That will likely determine what transducer will be compatible. Most recent B&G plotters support depth transducers connected via NMEA 0183, NMEA 2000 or a 9pin connector which is used to connect to a CHIRP or Forward Scan Sonar transducer.

So, sounder is Raytheon, transducer Airmar.

When you say the 'sounder is Raytheon', do you mean that you have a Raytheon Depth Display or a Raytheon Depth Display and Raytheon transducer ? What model of Airmar transducer ? (They usually have a white tag on the cable with an Airmar and OEM part number printed on it). What is the Airmar transducer connected to ?

Nonetheless the Airmar DST 810 is a NMEA 2000 transducer and will integrate with any Instrument Display or Multi-Function Display that support NMEA 2000. The NMEA 2000 PGN's for depth, water speed and water temperature are well known standards and supported by all manufacturers. The only thing you may need to do is calibrate the water speed and depth offset using the Airmar CAST app.

You may wish to review the following Airmar documents to determine compatibility etc.

Airmat Connector Guide

Airmar Cross Reference

[Drinky Crow]

Display is Raytheon, transducer Airmar. No lockring but buddy say they sometimes has a "pin".
Don't matter no how as it's all being pulled and sold 2nd hand.
Have Zeus 7 and have ordered Airmar/through hull unit pictured above.

[sailingharry]

One word of caution (but it's been ordered)... I THINK (but am not sure) that the DST800 comes in N2K, 0183,and I think proprietary versions. Same look, same housing, different wire, connection, and protocol. The most common is N2K.