I see one old ebay listing which doesn't help at all. Thanks!
Model: 003-25905-00
Posted by scottocs
1 Comment
radashlynn on
I don’t know how accurate it is but ChatGPT says
Thanks! With Model 003-25905-00 that label matches a Garmin / Airmar NMEA 2000 Smart Transducer.
That part number is not a traditional sonar brick like the GT23, but a smart thru-hull depth/temperature/speed sensor that talks over the NMEA 2000 network.
What this means
✔️ It outputs data like:
• Depth
• Water temperature
• Speed through water (if it has a paddlewheel)
• Boat speed
✔️ It plugs into your boat’s NMEA 2000 backbone using that Micro-C connector.
✔️ It doesn’t plug into a fishfinder’s sonar port and doesn’t produce CHIRP images.
Likely exact identity
This is essentially Garmin’s version of the Airmar DST800/DST810 style sensor — the Garmin NMEA2000 Smart Transducer sold under Garmin part number 003-25905-00.
So in plain terms:
It’s a smart depth/temperature (and possibly speed) transducer for NMEA 2000 networks.
If you want to know exactly what data it provides (depth only vs depth/speed/temperature), a shot of the thru-hull pod end (the part that lived in the bottom of the boat) would confirm it for sure.
1 Comment
I don’t know how accurate it is but ChatGPT says
Thanks! With Model 003-25905-00 that label matches a Garmin / Airmar NMEA 2000 Smart Transducer.
That part number is not a traditional sonar brick like the GT23, but a smart thru-hull depth/temperature/speed sensor that talks over the NMEA 2000 network.
What this means
✔️ It outputs data like:
• Depth
• Water temperature
• Speed through water (if it has a paddlewheel)
• Boat speed
✔️ It plugs into your boat’s NMEA 2000 backbone using that Micro-C connector.
✔️ It doesn’t plug into a fishfinder’s sonar port and doesn’t produce CHIRP images.
Likely exact identity
This is essentially Garmin’s version of the Airmar DST800/DST810 style sensor — the Garmin NMEA2000 Smart Transducer sold under Garmin part number 003-25905-00.
So in plain terms:
It’s a smart depth/temperature (and possibly speed) transducer for NMEA 2000 networks.
If you want to know exactly what data it provides (depth only vs depth/speed/temperature), a shot of the thru-hull pod end (the part that lived in the bottom of the boat) would confirm it for sure.