Garmin GPSMAP 168 Sounder Owner's Manual And Reference Manual page 113
Chartplotting receiver & depth-finder
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Also See for GPSMAP 168 Sounder:
- Owner's manual and reference manual (123 pages) ,
- Specifications (2 pages) ,
- Owner's manual and reference manual (123 pages)
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Appendix H
Understanding the Chart
104
Thermoclines
One of the unique features offered by GARMIN is See-Thru technology. See-Thru technology
allows the GPSMAP 168 Sounder to see through thermoclines and helps locate fi sh where they live;
and fi sh love the thermocline.
H
A rough defi nition of a thermocline is a break in water where the water temperature
changes faster than the water above it. The thermocline usually displays as a gray
level as shown below.
Thermocline
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