Furuno CH-270 - Manual (Page 61)

3. VERTICAL SCAN MODE
3-7
3.5 Choosing Display Sector
Sector means the width of the transducer training, from 6 ° to 180°.
24
° Sector (Shown: 24 °)
Sector
The [SECTOR] control chooses 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, and “FULL”
momentarily appears at the top of the display.
2. Press the [FULL/HALF] key again, and a 120 °-sector display is presented, and
120 ° momentarily appears at the top of the display.
Note: Operating the [SECTOR] control after step 1 in the procedure above will display 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
°
How the FULL/HALF key works