New Transducers 250C ユーザーズマニュアル

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One feature unique to Garmin is See-Thru

®

 technology. See-Thru 

technology allows the Fishfinder 250/250C to “see” through 

thermoclines and locate fish where they live—and fish love 

thermoclines. A rough definition of a thermocline is a break in the 

water where the temperature changes faster than in the water above 

it. Thermoclines give weak returns and are shown as the weakest 

colors/shades (page 15).

Thermocline