NOTE
Depth Tracker settings always return to
the defaults when you exit PC/View.
However, if the gain is set so that the screen is dark,
revealing only obstacles and very bright mid-water
targets, the Low threshold setting may be required in
order to continue to track the depth.
Alternatively, if the gain is set high so that every-
thing is bright, the High threshold may be necessary
to avoid tracking depth on bait balls and other strong
mid-water returns.
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