Sonde traversante GST™ 43 + GST™ 10 - visuel officiel Garmin 2

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Garmin

010-04284-00

GST™ 43 Through-Hull Transducer + GST™ 10

The Garmin GST 43 through-hull transducer kit with GST 10 adapter provides accurate speed (up to 90 knots, ±1%) and water temperature measurements, with NMEA 2000 and legacy Nexus connectivity. Includes GST 43 transducer, GST 10 adapter, split cable, T-connector, and transport plug.

Price excl. import taxesBenefit from the professional rate

£135.89 GBP

£135.89 GBP ~~£151.93 GBP~~

Shipping calculated at checkout.

Prices exclude import taxes (indicative rate: UK import VAT 20%). DAP delivery: import taxes are paid on delivery.

Available in stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Technical specifications

Max power consumption	0.9 W
Typical power consumption	0.3 W
NMEA 2000 Load Equivalency Number (LEN)	1 LEN
Operating voltage	12 Vdc
Operating temperature	-15 to 70 °C
Product width	24.7 mm
IP rating	IPX7
Bus compatibility	NMEA 2000, Nexus
Wired network	NMEA 2000, Nexus
Mounting type	Porthole
Certifications	CE,FCC Part 15 Class B,ISED Canada,WEEE,RoHS,REACH
Housing material	Plastic
Cable length	6.0
Retractable	Yes
Hole saw size	43 mm
Sensor type	Paddlewheel
Sensor output type	NMEA 2000
Sensor compatibility	Speed and water temperature
Transducer mounting type	Athwartships
Temperature measurement	Yes
Speed measurement accuracy	±1 %
Blanking plug included	Yes
Boat speed calibration	Yes
Cable jacket material	PVC
Compass safe distance	5 cm
Compatible displays	All Garmin displays compatible with NMEA 2000
Core hull installation kit required	Yes
FCC compliance class	Class B
Fishing type	Sea, Lake
Flush mount	No
GST 10 adapter dimensions	24.7 x 17.0 x 78.6
GST 10 input voltage range	9 to 16
GST 10 operating temperature range	-15 to 70
GST 43 transducer dimensions	42 x 86
GST 43 input voltage	12
GST 43 operating temperature range	-10 to 70
Hole saw size for installation	43
Installation location	Hull
Integrated speed sensor	Yes
Integrated temperature sensor	Yes
Max depth reading	0.0
Min speed measurement	0 knot
Nexus legacy network compatibility	Yes
Supported NMEA 2000 PGNs	128259, 130312
Replaceable paddlewheel	Yes
Peak power	0.0
Maximum power consumption (GST 10)	0.9
Power consumption (GST 43)	0.06
Release year	2021.0
Self-closing valve	No
Speed measurement principle	Paddlewheel
Speed range	0 to 90 knots
Storage temperature range	-35 to 70
Total cable length	4.9
Transducer cable length	6
Transducer material	Plastic
Warranty	2.0
Temperature measurement range	-10 to 70 °C
Wireless connectivity	No

Detailed description

The Garmin GST™ 43 + GST 10 through-hull transducer is a complete water speed and temperature measurement kit designed for sailboats and powerboats requiring reliable precision. This kit combines the GST 43 transducer with the GST 10 network adapter, enabling direct integration on an NMEA 2000 network or a legacy Nexus system. With a speed accuracy of ±1% and a capability of up to 90 knots (depending on the transducer type), this kit provides essential data for navigation and performance optimization, whether cruising or racing.

Integration and connectivity

The GST 10 acts as a gateway between the GST 43 transducer and your onboard network. It connects to the NMEA 2000 network via a drop cable and a T-connector (included). The GST 43 can also be wired directly to a legacy Nexus network following the provided color code (green, yellow, white, shield). Once connected, the GST 10 appears as a device in the NMEA 2000 equipment list on Garmin, GMI, or GNX chartplotters. It supports essential PGNs: water speed (128259) and temperature (130312).

Installation and calibration

Installing the GST 43 through-hull transducer requires a 43 mm hole in the hull. For sandwich hulls (cored fiberglass), specific preparation steps are required, including the use of resin or epoxy to seal the core. Temperature calibration is performed via the NMEA 2000 network menu on a Garmin chartplotter, GMI, or GNX. The GST 43 transducer comes with a transport cap, useful for cleaning or maintenance.

Comparison and positioning

Compared to the Garmin GST 20 transducer, which is limited to lower speeds and direct NMEA 2000 connectivity, the GST 43 + GST 10 offers superior speed capability (up to 90 knots) and increased integration flexibility thanks to the dedicated adapter. This kit is a cost-effective alternative to competing brands such as Airmar transducers, offering native compatibility with Garmin and Nexus networks. For sailors seeking a reliable and scalable speed and temperature measurement solution, this kit is an excellent value.

Documentation

Type	Nom
	EN - Instructions d'installation - Sonde traversante GST™43 + GST10
	EN - Informations importantes sur la sécurité et le produit - Sonde traversante GST™43 + GST10
	Notice d'installation - install Installation Instructions
	Conformite et securite - Informations importantes sur la sécurité et le produit Garmin (EN)

Expert opinion

Pol CONIN

Digital Manager

« Reliable and versatile speed and temperature measurement »

The GST 43 + GST 10 kit is a robust and reliable solution for boaters requiring precise speed and temperature data. The GST 10 adapter simplifies integration on an NMEA 2000 network, while compatibility with legacy Nexus systems is an asset for upgrades. The ±1% accuracy and ability to measure up to 90 knots make it a relevant choice for both cruising and regattas. Installation requires a 43 mm hole and careful sealing for sandwich hulls. It offers excellent value for money for a Garmin-branded piece of equipment.

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GST™ 43 Through-Hull Transducer + GST™ 10

£135.89 GBP

£135.89 GBP ~~£151.93 GBP~~

Frequently Asked Questions

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What types of data does the Garmin GST 43 + GST 10 kit provide?

This kit measures and transmits two essential data points: speed through water (STW) and water temperature. Speed is measured with an accuracy of ±1 %, and depending on the transducer type, it can reach up to 90 knots.

What is the required hole diameter for installing the GST 43 through-hull transducer?

Installing the GST 43 through-hull transducer requires a 43 mm (1 11/16 inches) hole in the hull. For sandwich (cored-fiberglass) hulls, an additional 52 to 55 mm hole may be needed to prepare the core.

Is the GST 43 transducer compatible with a NMEA 2000 network?

Yes, absolutely. The GST 43 transducer connects to the NMEA 2000 network via the GST 10 adapter. The kit includes a drop cable and a T-connector for direct integration. Once connected, the GST 10 appears as a device in the NMEA 2000 equipment list on Garmin, GMI, or GNX chartplotters.

Can I connect the GST 43 transducer directly to an older Nexus network?

Yes, the GST 43 can be wired directly to a legacy Nexus network. Simply cut the transducer cable to the desired length and connect the wires following the provided color code: green to green, yellow to yellow, white to white, and the shield to the shield. The blue wire is not used.

Which NMEA 2000 PGNs are supported by the GST 10?

The GST 10 supports essential PGNs for navigation: PGN 128259 (Speed: Water reference) for water speed and PGN 130312 (Temperature) for water temperature. It also supports network management PGNs such as ISO acknowledgment (59392), ISO request (59904), and ISO address claim (60928).

What is the length of the cable supplied with the GST 43 transducer?

The GST 43 transducer cable is 6 m (19.7 ft) long. This provides sufficient flexibility to route the transducer from its mounting location to the GST 10 adapter or the onboard network.

What is the power consumption of the GST 43 + GST 10 kit?

Power consumption is very low. The GST 43 transducer consumes 0.06 W at 12 Vdc. The GST 10 adapter has a maximum consumption of 0.9 W. The system is therefore very energy-efficient.

What are the operating and storage temperatures of the GST 43 depth sounder?

The GST 43 transducer operates within a temperature range of -10 °C to 70 °C (14 °F to 158 °F). For storage, the range is extended from -35 °C to 70 °C (-31 °F to 158 °F).

Is the GST 10 adapter waterproof?

Yes, the GST 10 adapter has an IPX7 protection rating per IEC 60529. This means it can withstand temporary immersion in water up to 1 meter deep for 30 minutes.

Where should I install the GST 43 through-hull transducer on my boat for optimal performance?

For optimal performance, the transducer must be mounted in an area of clean, non-turbulent water. On keel sailboats, install it more than 25 cm and less than 75 cm ahead of the keel. On powerboats, avoid mounting it near sharp chines. Ensure it is parallel to the boat’s fore-aft axis and outside the propeller wash.

Which tools are required to install the GST 43 through-hull transducer?

Required tools include: a drill, a 43 mm hole saw, marine sealant, silicone grease, a cable cutter, and for sandwich hulls, a 52–55 mm hole saw, resin, fiberglass cloth or casting epoxy. A 43 mm cylinder for sealing the core is also recommended.

How to calibrate the GST 43 temperature transducer?

Temperature calibration is performed via a Garmin device connected to the NMEA 2000 network. On a chartplotter, go to Settings > Communications > NMEA 2000 Configuration > Device List. Select the GST 10, then choose Review or Configure and finally Temp Offset. Enter a positive value if the transducer measures a temperature lower than actual, or a negative value otherwise.

Can I use the GST 43 transducer with a display other than Garmin?

Yes, because the GST 10 is a standard NMEA 2000 device. It can therefore be recognized by any NMEA 2000-compatible display or chartplotter, provided that it supports PGN 128259 (speed) and 130312 (temperature). However, for optimal configuration and easy calibration, use with a Garmin device is recommended.

What is the safe distance from the compass for the GST 10 adapter?

The recommended safe distance from a compass is 5 cm (2 inches). It is important to respect this distance to avoid any magnetic interference with the boat's compass.

Is the GST 43 + GST 10 kit supplied with an NMEA 2000 spur cable?

Yes, the kit includes a drop cable and a T-connector to connect the GST 10 to an existing NMEA 2000 network. You do not need to purchase these accessories separately.

Can I replace an old speed transducer with this Garmin kit?

Yes, this is entirely possible. This kit is designed as a direct replacement or upgrade solution. If your old depth sounder used a 43 mm mounting hole, installation is straightforward. Otherwise, you may need to modify the hole. Ensure your onboard network (NMEA 2000 or Nexus) is compatible.

What is the required supply voltage for the GST 10 adapter?

The GST 10 adapter operates with a supply voltage between 9 and 16 Vdc. It is therefore compatible with most 12 V electrical systems on boats.

Is the GST 43 supplied with a winterizing or maintenance protection cap?

Yes, the kit is supplied with a plastic plug that installs in the through-hull fitting. Garmin recommends keeping this plug for use when cleaning or servicing the transducer, or to protect the hole when the transducer is removed.