background image

Nexus

®

 Network Wiring

When you connect the GST 43 to a Nexus system, you must cut 

the GST 43 cable to the desired length and connect the wires in 

the cable to the wires in the Nexus system.

GST 43

Nexus

Green

Green

Yellow

Yellow

White

White

Screen

Screen

Blue

Do not use

Transducer Calibration

You must calibrate the GST 43 transducer.
When connected to a Nexus system, you must calibrate the 

GST 43 transducer using a Nexus NX display or the 

NexusRace

 software. To download the NexusRace software, 

go to 

www.garmin.com/NexusRace

.

Maintenance

Testing the Installation

NOTICE

You should check your boat for leaks before you leave it in the 

water for an extended period of time.

The paddlewheel in the transducer measures water flow, and 

the transducer must be in the water to work properly. The 

transducer does not provide water flow data when it is out of the 

water.

1

When your boat is in the water, check for leaks near the 

transducer installation site.

2

If leaks are found, apply marine sealant around the 

installation site, let the sealant cure, and repeat step 1.

Cleaning the Transducer

Aquatic fouling accumulates quickly and can reduce your 

device's performance.

1

Remove the fouling with a soft cloth and mild detergent.

2

If the fouling is severe, use a scouring pad or putty knife to 

remove growth.

3

Wipe the device dry.

Specifications

GST 43 Specifications

Dimensions (W x L)

42 x 86 mm (1.65 x 3.38 in.)

Hull thickness

Min. 6 mm (0.24 in.)
Max. 42 mm (1.65 in.)

Power input

12 Vdc (From 10 to 16 Vdc)

Power consumption

0.06 W

Temperature range

Operating: From -10 to 70ºC (14 to 158°F)
Storage: From -35 to 70ºC (31 to 158°F)

Speed range

From 0.2 to 30 knots
Depending on transducer type: Max. 90 kn

Speed accuracy

± 1%

Transducer cable length 6 m (19.7 ft.)

GST 10 Specifications

Dimensions (W x H x L) 24.7 x 17.0 x 78.6 mm (31/32 x 43/64 x 3 

3/32 in.)

Weight

380 g (13.33 oz)

Power input

From 9 to16 Vdc

Max. power usage

0.9 W

Compass-safe distance 5 cm (2 in.)
Temperature range

From -15 to 70°C (from 5 to 158°F)

Material

PCB overmold: Thermoplastic rubber
Cable jacket: PVC
Overmold connectors and strain reliefs: PVC

Water rating

IEC 60529 IPX7

Total cable length

4.9 m (16 ft.)

NMEA 2000 (LEN)

1 (50 mA)

NMEA 2000 PGN Information

Type

PGN

Description

Transmit and 
receive

005932 ISO acknowledgment

059904 ISO request
060928 ISO address claim
126208 NMEA

®

:Command, request, and 

acknowledge group function

126464 Transmit and receive PGN list group function

Transmit

126996 Product information
128259 Speed: Water reference
130312 Temperature

© 2015–2017 Garmin Ltd. or its subsidiaries
Garmin

®

, the Garmin logo, and Nexus

®

 are trademarks of Garmin Ltd. or its subsidiaries, 

registered in the USA and other countries. GST

 and NexusRace

 are trademarks of 

Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express 
permission of Garmin.
NMEA 2000

®

 and the NMEA 2000 logo are registered trademarks of the National Marine 

Electronics Association.

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