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General| GPS | Yes |
|---|---|
| Waterproof Rating | IPX7 |
| Battery Life | Up to 8 hours |
| Sonar | Dual-beam |
| Frequency | 200kHz |
| Depth Range | 600 ft (183 m) |
Physical dimensions of the 400 series fishfinder.
Maximum depth the fishfinder can detect.
Type of transducer used by the fishfinder.
The operational frequency of the sonar.
The beam angle of the transducer.
Sensitivity of the sonar receiver.
The power output of the fishfinder's sonar.
Specification for boat speed measurement on FISH440.
Specification for water temperature measurement on FISH440.
Physical dimensions of the display screen.
The type of display technology used.
The resolution of the display in pixels.
The required input voltage for the unit.
Information about the display's backlighting.
The operating temperature range for the unit.
Feature for recording distance traveled.
Power output specific to the FISH440 model.
Guidance on selecting a suitable mounting location for the display unit.
Criteria for selecting the optimal mounting location for the transducer.
Instructions on how to physically mount the transducer bracket.
Information on using different types of NAVMAN transducers.
Details on the unit's internal electrical protection.
Wiring requirements for different transducer types and models.
Overview of the fishfinder's sonar technology and models.
Explanation of basic functions and button operations.
How to navigate and use the device's menu system.
Description of the Echo mode display and its uses.
Explanation of the Autofish mode and its benefits.
Steps to change the fishfinder's operating mode.
How to adjust the depth range displayed on the screen.
Instructions on how to adjust the gain settings.
How to adjust the speed at which the display scrolls.
How to configure and set various alarm types.
Details on the fish detection alarm.
Details on the shallow water depth alarm.
Details on the deep water depth alarm.
How alarms are indicated on the FISH440 model.
Information about the anchor drag alarm function.
Guide to customizing various settings in the setup menu.
Adjusting the brightness of the display's backlighting.
Selecting units for depth measurement.
Adjusting depth readings based on keel position.
Enabling simulation mode for learning device functions.
Adjusting the contrast of the LCD screen.
Description of the white line feature for bottom detail.
Customizing speed and temperature display and calibration.
Selecting units for displaying water temperature (°C or °F).
Calibrating the displayed water temperature reading.
Selecting units for displaying boat speed (knots, MPH, KPH).
Calibrating the displayed boat speed reading.
Option to reset the distance log.
Steps to resolve issues when the fishfinder does not power on.
Solutions for the fishfinder freezing or behaving erratically.
Troubleshooting weak signals or unstable readings.
Diagnosing issues with bottom echo during boat movement.
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