Humminbird 981 Fish Finder User Manual


 
SONAR ZOOM VIEW
Sonar Zoom View increases the displayed resolution to separate sonar returns that are
very close together, such as those caused by fish suspended close to the bottom or
within structure. In Zoom View, the display is split to show a narrow slice of the full
range view on the right and the zoomed view on the left. The full range view on the
right also contains the Zoom Preview Box that shows what part of the full range view
is shown in zoom view on the left; the Zoom Preview Box tracks the bottom in the full
range view.
As the depth changes, the zoomed view updates automatically to display a magnified
image of the bottom. The Zoom Preview Box shows where the zoomed view is in
relation to the full range view. The Zoom Level, or magnification, is displayed in the
lower left corner and can be changed to suit conditions (see Sonar X-Press™ Menu:
Zoom Level). Upper and Lower Zoom Depth Range numbers indicate the depth of the
water which is being viewed.
Freeze Frame - Pressing any arrow on the 4-WAY Cursor Control key will freeze the
screen in the Sonar Zoom View and a cursor and cursor dialog box will be displayed on
the screen. The cursor can be positioned on the display using the 4-WAY Cursor Control
key to determine the depth of any sonar return. The RTS® Window continues to update
in Freeze Frame. In addition, see the effects of menu setting changes with Instant
Image Update.
Pressing EXIT will exit Freeze Frame and the display will start to scroll.
Sonar Zoom View
Depth Upper Depth Range, Full Range View
1
7
Triplog Upper Depth Range, Zoom View
2
8
Temperature Zoom Preview Box
3
9
Speed Full Range View
4
10
Zoomed View Lower Depth Range, Full Range View
5
11
Zoom Level Lower Depth Range, Zoom View
6
12
1
2
3
4
5
6
7
8
9
10
11
12
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