2
Install the locking rings on the marine network and power
cables.
3
Connect the bare-wire end of the power cable to a 12 Vdc
power source and to ground.
4
Align the notch on the end of the power cable with the power
port on the device, and press the cable into place.
5
Tighten the locking ring.
6
Select an option:
• If your boat is equipped with a GMS
™
10 network port
expander, connect the network cable to an available port
on the GMS 10.
• If your boat is not equipped with a GMS 10 network port
expander, connect the network cable directly to the
network port on your chartplotter.
Cable Routing Grommets
When routing cables through your boat, it may be necessary to
drill holes to route the cables. Cable routing grommets can be
used to cover cable installation holes. The grommets do not
create a waterproof seal. If necessary, apply a marine sealant
after installation to weatherproof around the grommet and the
cable. You can purchase grommets from your Garmin dealer or
directly from Garmin at
Installation Diagram
You can use this diagram to identify the connection points from
your sounder to the network, power, and transducer.
Item
Description
À
Chartplotter
Á
GSD 25
Â
Power Source
Ã
Transducer
Blink Codes
After the sounder is installed, it turns on when the chartplotter is
turned on. The two-color (green and red) status LED on the
sounder indicates its operational status.
LED
Color
State
Status
Green
Slow blink
The sounder is connected to a chartplotter
and is operating properly. You should see
sonar data on the chartplotter.
Red
Slow blink
The sounder is turned on, but is not
connected to a chartplotter, or is waiting to
connect to a chartplotter. If the sounder is
connected to the chartplotter and this code
persists, check the wiring connections.
Red/
Green
Slow blink
The sounder is in test mode.
Red
Rapid blink
sequence
System error. The chartplotter displays a
message indicating the type of failure. When
the error condition is fixed, the sounder must
be completely disconnected from and
reconnected to its power source to clear the
error.
Red
Solid
The sounder has a hardware failure. Contact
Garmin Product Support for assistance.
Specifications
Specification
Measurement
Size
W × H × D: 251 x 66 x 192 mm (9.9 x 2.6 x
7.6 in.)
Weight
771 g (1.7 lb.)
Case material
Fully gasketed, polycarbonate plastic
Water rating*
IEC 60529 IPX7
Temperature range
From -15° to 70°C (from 5° to 158°F)
Power input
From 10 to 35 Vdc
Power usage
27 W maximum
Fuse
4.0 A
Compass safe
distance
30 cm (11.8 in.)
Transmit power
(RMS)**
1 kW
Frequency
Traditional sonar: 50/77/83 kHz
Single channel and dual channel CHIRP: 40 kHz
to 250 kHz
SideVü/DownVü: CHIRP 455/800 kHz and
260/455 kHz
Depth***
Traditional: 1524 m (5000 ft.); DownVü: 305 m
(1000 ft.); SideVü: 229 m (750 ft.) left and right.
Data output
Garmin Marine Network
*The device withstands incidental exposure to water of up to 1 m
for up to 30 min. For more information, go to
.
**Dependent upon transducer rating and depth
***Maximum depth, dependent upon transducer, water salinity,
bottom type, and other water conditions.
Garmin
®
and the Garmin logo are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. GSD
™
is a trademark of Garmin Ltd. or its subsidiaries. These trademarks may not be
used without the express permission of Garmin.
© 2014 Garmin Ltd. or its subsidiaries
www.garmin.com/support
