Garmin GPSMAP 376C Bedienungsanleitung Seite 122

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Whiteline
The GSD 20 or GSD 21 can help you determine whether the bottom
is hard or soft. When the sonar sound waves are reected back
by the bottom, a hard bottom returns a stronger signal than a soft
bottom. A thin whiteline indicates a softer bottom, while a thick
whiteline indicates a harder bottom. Normally, a red line is used
to show the point where water meets the bottom. This line follows
the bottom contour, along with any signicant objects lying on the
bottom. The unit uses the whiteline function to make the bottom
layer information easier to distinguish.
Whiteline OffWhiteline On
Thick
Whiteline: Hard
bottom
Thermoclines
A rough de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.
One of the unique features offered by Garmin is See-Thru
®
technology, which allows the GPSMAP 376C to hear both weak and
strong signals simultaneously so it can identify sh returns under
the toughest conditions, such as suspended in thermoclines or even
hiding near structures. See-Thru technology allows the GSD 20 or
GSD 21 to “see” through thermoclines and helps locate sh where
they live.
Thermocline
114 GPSMAP 376C Owner’s Manual
settIng uP And usIng sonAr > understAndIng sonAr
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