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Appendix G
Understanding the Graph
Thermoclines
One of the unique features offered by Garmin is See-Thru technology. See-Thru technology allows
the GPSMAP 178C to “see” through thermoclines and helps locate fi sh where they live; and fi sh love
thermoclines! A rough defi nition of a thermocline is a break in water where the water temperature
changes faster than the water above it. Thermoclines are shown as the weakest colors (see pg. 14)
Thermocline
GPSMAP178CManual.indd 115 3/19/2004, 3:11:14 PM
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