The Garmin GDT 43 NMEA 2000 Depth & Temperature Transducer (010-01749-10) is a thru-hull marine transducer designed for accurate water depth and water temperature monitoring on sailboats and powerboats.
Built by Garmin for NMEA 2000 network integration, this 43 mm thru-hull depth transducer retrofits existing Nexus and Silva TH43 installations and connects directly to compatible Garmin GPSMAP chartplotters, GMI instrument displays, and GNX sailing instruments.
Ideal for coastal cruising, offshore sailing, racing, and fishing applications requiring reliable real-time depth and temp data.
GDT 43 Features
• Thru-hull depth and water temperature transducer
• Reads precise water depth for safe navigation
• Monitors real-time water temperature
• 43 mm housing – retrofits Nexus & Silva TH43 installations
• NMEA 2000 network compatible (adapter required when bundled)
• Designed for Garmin marine electronics integration
• Ideal for sailboats, cruisers, and powerboats
NMEA 2000 Network Integration
When bundled with the NMEA 2000 adapter, the GDT 43 connects directly to your vessel’s NMEA 2000 backbone, allowing depth and temperature data to be displayed across multiple compatible Garmin chartplotters and marine instrument displays. This ensures seamless system integration without the need for legacy analog wiring.
Perfect for upgrading older Nexus or Silva 43 mm thru-hull systems to modern Garmin NMEA 2000 marine electronics.
Accurate Depth & Water Temperature Monitoring
The GDT 43 provides dependable depth readings to help prevent grounding in shallow water and improve safe harbor entry. Integrated temperature sensing allows boaters and anglers to monitor water conditions for improved navigation and fishing strategy.
Ideal Applications
• Coastal and offshore sailing
• Cruising sailboats
• Performance racing sailboats
• Powerboats and center consoles
• Shallow water navigation
• Fishing temperature tracking
Retrofit Compatibility
The 43 mm thru-hull housing allows direct retrofit replacement of:
• Nexus TH43 transducers
• Silva 43 mm thru-hull depth transducers
This makes installation simple for vessels upgrading to Garmin marine electronics systems.
Compatible Garmin Devices
• Garmin GMI 10
• Garmin GMI 20
• Garmin GNX 120
• Garmin GNX 130
• Garmin GNX 20
• Garmin GNX 21
• Garmin Wireless Sail Pack 43
• Garmin GPSMAP Series chartplotters (NMEA 2000 compatible models)
Technical Specifications
• Manufacturer: Garmin
• Model: GDT 43
• Manufacturer Part Number: 010-01749-10
• Transducer Type: Thru-hull
• Diameter: 43 mm
• Functions: Water depth and water temperature
• Network: NMEA 2000 (with adapter)
• Mounting Style: Thru-hull installation
• Application: Sailboats and powerboats
What’s Included in the Box
• Garmin GDT 43 thru-hull depth & temperature transducer
• Installation documentation
(NMEA 2000 adapter included when bundled; may vary by package)
Warranty & Support
• Manufacturer Warranty: 1-Year Limited Warranty
• Backed by Garmin marine electronics support
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
