Bottom Hardness; Alarm Adjustment; Zoom & Bottom Track - Interphase Vista Operation Manual

the soft key labeled "LAST" to return to the main
forward looking menu.
Hardness (White-Line)
The shaded area on this bottom display will give you an
indication of the bottom hardness. On a soft muddy or
sandy bottom the shaded area will be thinner and on a
hard rock bottom it will be thicker.

Alarm Adjustment

In the down looking display or view, a shallow alarm can
be set. To adjust or clear the alarm setting, press the soft
key labeled ALARM . As either the "Ç" or "È" keys
are pressed and held down, or the front panel knob is
rotated, a vertical bar on the right side of the screen
(just below the boat icon) shows the area covered by the
depth alarm. Whenever a solidly displayed target appears
at the same depth as that covered by the alarm bar, the
audible alarm sounds to warn you of underwater targets
or changing bottom conditions.
The S
hallow Alarm is often used to alert the user to
shallowing bottom conditions and the presence of
underwater targets and can be even be used to detect the
presence of fish beneath the boat.
Zoom & Bottom Track & Bottom Lock
(Split Screen displays)
When using the Down display (conventional down
looking view), the VISTA can also display a split screen
high resolution zoom of any 25% of the depth range, or
can show a split screen Bottom Track or Bottom Lock
display. The high resolution Zoom is very useful when
looking for extra detail on the bottom or in areas above
the bottom. Because the VISTA uses an Interphase
unique 4X over-sampling technique, the zoom actually
shows more data than the non-zoomed picture.
Fishermen have long used the bottom locking features
when fishing over a rocky bottom or when fishing in
rough surface conditions. In the Bottom Track mode, a
zoomed view of the bottom is shown on the left side of
the split screen display. Regardless of changes in bottom
depth, the left side tracks it and keeps the zoomed bottom
picture in view. In the Bottom Lock mode, the bottom is
forced to appear as a straight horizontal line across the
bottom of the left side of the LCD while any targets close
to the bottom are displayed above the bottom line. Over
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Tuesday, July 06, 1999 10:15