Furuno CH-250 - Manual (Page 55)

3-5
3.5 Selecting Display Sector
Sector means the width of the transducer training, from 6 ° to 180 °.
24˚ Sector (Shown: 24˚)
Figure 3-6 Sector
The [SECTOR] control selects the training area among the sixteen positions shown in the table
below. Clockwise rotation of the control increases the sector width; counterclockwise rotation
decreases it.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Sector
width (
° )
6 12 24 36 48 60 72 84 96 108 120 132 144 156 168 180
One-touch selection of 180
°°°°
sector
1. Press the [FULL/HALF] key. A half-circle display of 180 ° is presented.
2. Press the [FULL/HALF] key again, and a 120 ° -sector display is presented.
Note: Operating the [SECTOR] control between steps 1 and 2 in the procedure above displays
the 180 ° sector at the next pressing of the [FULL/HALF] key.
24˚
FULL/HALF
key
Sector set with
SECTOR control
Half circle
180˚ 0˚ 180˚ 0˚
120˚
FULL/HALF
key
180˚
Figure 3-7 How the FULL/HALF key works