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Zoom. The 425SX uses a greatly enhanced Zoom
capability called “TruZoom” which offers expanded
information on a select area of sonar information.
Zoom is similar to Depth Range because it controls the
range of information displayed on screen. Zoom,
however, allows for selection of ranges beneath the
surface so any area of water between the surface and
the bottom can be enlarged to provide more detailed information. By using the
full display to show a small area of coverage, the effective display resolution is
increased, and the unit’s ability to separate close targets is enhanced.
The Zoom ranges available are dependent on the
current depth range. In the 5m (15') depth range,
TruZoom displays a range equal to one half the
current depth range. In the 10m (30'), 20m (60'), 40m
(120'), 60m (180'), 80m (240'), 110m (360'), 150m
(480') and 185m (600') depth ranges, TruZoom
displays a range equal to one fourth the current depth
range. The box at the right side of the screen outlines
the area to be zoomed.
The 425SX shows Zoom range in conjunction with
the full depth range. The Zoom range is shown on
the left side of the screen and full range information
is shown on the right side of the display. The area
which is being enlarged by Zoom is indicated by the
square box. Zoom can either operate automatically,
in which the Zoom range is constantly adjusted to
show the bottom, or manually, in which the user
controls the location of the Zoom range.
“Automatic” Zoom is especially helpful when looking
for structure or bottom detail. The “Automatic” Zoom
keeps the bottom in view even in quickly changing
terrain. “Manual” Zoom provides detailed information
of any area from the surface to the bottom.
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USING THE 425SX
MENU FUNCTIONS