NorthStar Navigation EXPLORER 435 - Manual (Page 21)

Northstar Explorer 435/438 Installation and Operation Manual 21
4-4 Range
Range is the vertical depth displayed on the
Explorer 435 and Explorer 438.
The Northstar 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 recommended 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
To change between Auto Range and Manual
Range, hold the + or -. The Range mode is
displayed at the bottom of the screen.
Press the + or - key to change to increase or
decrease the range to the desired depth. Values
can be set between 10 ft (3 m) to 600 ft (180 m).
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.
5 The Displays
Press MENU once to show the Display menu,
then select a particular display using the or
cursor keys then press to confirm. (Section 2
Basic Operation, describes how to use the keys in
more detail.) The Display menu is summarized here and each
display is shown in the following sections.
Most displays have an Options menu so that
relevant features can be changed quickly.
The Display menu
Split Ratio
Use this to change the split ratio between the zoom and the sonar history sections displayed. The
default split ratio is 50%.
1. Highlight Split Ratio and press .
A left arrow and right arrow appear on either side of the divider line.
2. Use the or cursor keys to adjust
Hint: Press to return to the last sonar display used. Press MENU then to return to the previously
selected display. Use this to switch between two frequently used displays.
Refer to Section 3-2 Setup > Sonar, for information about customizing features on the sonar displays.
Full screen display of Sonar history (section 5-1)
Split display with Sonar and zoomed section (section 5-2)
Bottom trace displayed as flat line in zoomed section (section 5-3)
Split display with Sonar and echo strength (section 5-4)
Fuel data (section 5-5)
Water temperature, depth history and other boat data (section 5-6)
See below.