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 | NAVMAN | 21 |