Furuno GP-3500 Operator's Manual page 54

3. TRACKS
4. Rotate the [ENTER] knob to select "TRACKS BY DEPTH".
5. Roll the trackball leftward to select "RANGE."
6. Set the depths as desired. For example, to change track color to red when
the depth is more than 500 feet:;
a) Rotate the [ENTER] knob to select "RED xxxx.xx ft DEEPER."
b) Press the [0], [5], [0], [0], [0], [0] keys in that order, and then press the
[ENTER] knob.
Note: To erase, press the [CLEAR] key.
c) Set depths for other colors similarly. You cannot enter the depth for WHITE:
it is automatically set for the same depth as BLUE.
7. Press the [MENU] key several times to close the menu.
Changing own ship's track color by depth variation
This setting paints the track in up to seven colors according to depth variation
selected. For example, you could set up to change the track color for every 20
feet of depth change.
1. Press the [MENU] key to show the main menu.
2. Press the [4] key to show the MARKS/SHIP'S TRACKS SETUP menu.
3. If PAGE 2/2 appears, rotate the [ENTER] knob to select PREVIOUS PAGE.
4. Rotate the [ENTER] knob to select TRACKS BY DEPTH.
5. Roll the trackball rightward to select 2 ft, 20 ft or 200 ft of "GRDNT."
6. Press the [MENU] key several times to close the menu.
3-12
Depth steadily
increasing.
Example, track color changes with every 20 ft of depth change
Own Ship
Red
200
Purple
Light-blue
180
Green
160
Yellow
140
Red
120
100 ft