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4 Fishnder 340C Owner’s Manual
APPendIx > sPecIfIcAtIons And oPtIonAl AccessorIes
appendIx
Specications
Physical Specications
 6.2" H x 6.3" W x 3.1" D (15.8 cm x 16.0 cm x 8.3 cm)
 2.25 lbs. (1.02 kg)

5.0" diagonal (12.7 cm), 4.0" H x 3.0" W, 256-color TFT display
with adjustable brightness (234 x 320 pixels)
Fully gasketed, high-impact plastic alloy, waterproof to IEC 529 IPX7
standards
 5°F to 131°F (-15°C to 55°C)
Power
 10-33v DC
 17 watts max. at 10v DC; 15 watts at 13.8v DC nominal
 AGC/3AG - 3.0 Amp
Sonar
Dual frequency, 500 watts (RMS), 4,000 watts (peak to peak);
Dual beam, 400 watts (RMS), 3,200 watts (peak to peak)
50/200 kHz (dual frequency), 80/200 kHz (dual beam)

1,500 feet (dual frequency), 900 feet (dual beam)
(Depth capacity is dependent on water salinity, bottom type, and other water
conditions.)
Using Simulator Mode
You can use Simulator mode to practice and learn the operation
of the Fishnder. If the Fishnder does not detect a transducer, it
automatically starts in Simulator mode.
While in Simulator mode, the Fishnder shows a bottom scene,
and you can control the Fishnder (except the Gain and Auto Gain
options). If no keys are pressed for two minutes, the Fishnder
automatically resets to default settings while in Simulator mode.
To exit Simulator mode, turn off the Fishnder.
Optional Accessories
Purchase the following optional accessories on the Garmin Web site:
—mounts your Fishnder ush
on the bulkhead or cabin wall. Press the side clips to release the
Fishnder so you can take it with you.
—allows you to connect your Fishnder
340C to CANet-capable Garmin chartplotters, so you can read
sonar displays on chartplotters located elsewhere in the boat.
Go to www.garmin.com for the following information:
The most recent list of available accessories.
Documentation updates.