Raymarine 465 - Manual (Page 68)

57 Setup Instructions
line so you can choose the range you want. Use the < and >
arrows of the Page Control Pad to make a selection. Here
are the choices:
Possible Range Settings (Auto or Manual)
In feet: 5, 10, 15, 20, 30, 40, 50, 60, 80, 100, 150, 200, 250, 300, 400,
600, 800, 1000, 1500, 2000, 2500
In fathoms: 1, 2, 3, 4, 5, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100, 150,
200, 250, 300, 450
In meters: 2, 4, 6, 8, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100, 150, 200,
300, 400, 500, 600, 800
If you are done with your setup changes, press the CLEAR button to go
back to the normal display. To select the next menu item, press the up
arrow of the Page Control Pad.
Sensitivity Setting
Sensitivity adjusts the ability of the unit to tell the difference between
echoes of different strengths. In general, the sensitivity should be as high
as possible, to detect the fish and show the detail on the bottom.
However, if the sensitivity is too high, the unit will begin to see bubbles in
the water, debris, and other “background noise.” Use a higher sensitivity
setting for deeper water, and a lower setting for shallower water.
The 465 FishFinder has separate sensitivity settings for the 50kHz,
200kHz, and Sidelooker channels. On the bar graph below “Auto/Man,”
the number “200” shows that the sensitivity for the 200kHz signal is being
adjusted. “50” shows that the sensitivity for 50 kHz is being adjusted. If
Fig. 4-3
Sensitivity
Menu Item