USING THE 250DX
MENU FUNCTIONS
Fish Alarm. The Fish Alarm alerts you to the 
presence of fish, or other targets not connected to 
the bottom. The Fish Alarm has three different 
settings that correspond to the three different size 
fish symbols shown on-screen.
The default setting is “OFF.” With the “Large fish 
only” setting, the 250DX alarms on only those 
targets that are represented by the large fish 
symbols. The 250DX can be set to alarm on only 
large and medium fish, or set to alarm on all fish.
Once the Fish Alarm is enabled, the 250DX emits an 
audible beep when the selected size fish symbol 
appears 
Set for large fish only 
Set for large and medium fish 
Set for all fish
Triplog. Triplog provides a running log of 
information based on input from the Temp/Speed 
sensor.
Since Triplog requires information from the 
Temp/Speed sensor to operate, if this sensor
is not detected by the 250DX, the Triplog menu will not appear as an option.
Triplog provides seven pieces of information: the current digital depth, water surface temperature, current boat speed, the distance traveled since the 250DX was powered up or reset, the average speed, the total time elapsed since
The time, speed and distance calculations are useful for tracking your progress on a trip. The input voltage is useful for determining the condition of the charging system of the boat. When used in a portable application or whenever
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