Garmin GPSMAP 168 Sounder - Manual (Page 116)

105
Appendix H
Understanding the Chart
Understanding the Chart
It is important to understand that the unit does not display a 3-D representation of the underwater
environment. The unit can display multiple things at the same time, but can not determine where the
return originated– only when it was received.
Example 2 provides a look at the underwater world from a top view, and relates that view to what
would be displayed on the chart. On the chart it appears the fi sh and tree are side by side, but when
we look at the scene from the top we can see that the fi sh is several feet from the tree. It is important to
remember that the fi shfi nder can not determine where in the coverage area the tree or fi sh are, only that
the returns were received in the same time frame.
Example 2.
Enlarged
Transducer
View Branches
Fish
Enlarged
Transducer
View Branches
Fish
Remember that the Fishfi nder displays a 2D picture of the
underwater environment. The fi sh and tree could be located
anywhere in the coverage area at that time.
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