Vexilar 107 Pro - Manual (Page 23)

deeper, until it is no longer visible. The result is an arc
drawn on the display. If the fish passes on the edge of the
cone you will only see a partial arc. This arc affect will be
more evident the deeper the fish target is. Also, the arc will
be sharper as the boat speed increases.
The Clean Line feature can also help you identify fish
from floating debris. If the target appears cleaned out, you
can assume it's something significant, like a fish. In heavy
weeds this can be difficult to see.
SURFACE CLUTTER
The line of information going across the top of the dis-
play represents the surface of the water. This line can get
quit wide, at times, due to surface clutter. Tiny marine life,
such as algae or plankton, can be responsible for this.
Choppy or rough waters can also be a cause as tiny air bub-
bles are forced down under the surface.
Surface clutter has little effect on the performance of
the unit. It can, however, make things difficult to see in
shallow water.
HIGH SPEED OPERATION
The 107 Pro can read depths at almost any boat speed.
Due to the limited speed of the display, the displayed bot-
tom may be some distance behind you, depending on how
fast the boat is traveling. Use the A-Mode feature to help
you with high speed readings. Here, high speed is defined
as any speed at or above the speed at which the boat planes
out.
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