Navman FISH 4500/4600 - Manual (Page 21)

4-5 Range
Range is the vertical depth displayed on the
FISH 4500/4600.
The Navman fishfinder has two range modes,
Auto Range and Manual Range:
• In Auto Range, the fishfinder adjusts the
depth range automatically so the bottom
is always shown in the lower part of the
display. The use of Auto Range is recom-
mended for normal conditions.
• In Manual Range, the fishfinder shows only
a selected depth range. In areas of rapidly
changing bottom depth, such as the sea
floor around pinnacles, it can be useful to
prevent the display from rescaling to always
show the bottom. If the bottom is deeper
than the specified depth range, it will not be
shown on the display.
Changing the Range Mode
Press the + or - key to change to Manual Range
mode and to increase or decrease the range to
the desired depth. Values can be set between
10 ft. (3 m) to 2000 ft. (600 m).
To change from the current mode:
1. From any Sonar display, press MENU to
display the Options menu.
2. Highlight Range , then use the cursor keys
to select Auto or Manual.
3. Press ENT to confirm.
Zoom Range and Zoom Offset
On the Sonar Zoom and Sonar Bottom displays,
a vertical bar is shown on the far right of the
display. This is the zoom bar. The zoom bar
shows the zoom range; that is, the area that
is magnified.
Use the or cursor keys to adjust the
zoom range.
Use the or cursor keys to adjust the
zoom offset.
FISH 4500/4600 Installation and Operation Manual 21 NAVMAN