Furuno 851 MARK-2 - Manual (Page 17)

2-8
Tips for measuring the bearing
• Bearing measurements of smaller
targets are more accurate; the center of
larger target echoes is not as easily
identified.
• Bearings of stationary or slower moving
targets are more accurate than bearings
of faster moving targets.
• To minimize bearing errors keep echoes
in the outer half of the picture by
changing the range scale; angular
difference becomes difficult to resolve
as a target approaches the center of the
display.
Target on Collision course with your
vessel?
You can determine if a target might be
on a collision course with your vessel by
placing the EBL on the target. If it tracks
along the EBL as it approaches the
screen center it may be on a collision
course with your vessel.
2.12 Menu Operation
The menu, consisting of six sub menus,
mostly contains less-often used functions
which once preset do not require regular
adjustment. To open or close the menu,
press the [MENU] key. You can select
items and options on the menu with the
omnipad.
Basic menu operation
1. Press the [MENU] key to open the main
menu.
● MAIN MENU ●
Select item by ▲▼ keys
and press ENT key.
1. Backlight/Brilliance
2. P/L, IR, NR & Radar Mode
3. Nav Data
4. Mode & Function
5. Tuning
AUTO MANUAL
6. Self Check
7. Installation Setup 1
. . . . . . . . . . . . . . . . . . .
Press HM-OFF to temporarily
hide menu.
<Press MENU key to escape>
Figure 2-10 Main menu
2. Press the omnipad at 6 o’clock/12
o’clock to select menu and press the
[ENT] key.
3. Press the omnipad at 6 o’clock/12
o’clock to select a menu item.
4. Press the omnipad at 3 o’clock/9
o’clock to select an option.
5. Press the [ENT] key to register
selection.
6. Press the [MENU] key to close the
menu.