Furuno CH-270 - Manual (Page 24)

2. HORIZONTAL MODE
2-4
2.4 Choosing Sector Width
Sector means the width of the transducer training. The [SECTOR] control chooses the
training (display) area among the sixteen positions shown in the table below. Clockwise
rotation of the control increases the sector width; counterclockwise rotation decreases it.
96
°
Display sector
(shown: 96
°)
Display sector
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Sector
width
(
°)
6 24 48 72 96 120 144 168 192 216 240 264 288 312 336 360
In the full-circle mode (360 °) the direction of training is clockwise; in the half-circle mode
the direction is clockwise to counterclockwise alternately.
One-touch selection of 360
°°°° sector
Each pressing of the [FULL/HALF] key alternately chooses 360 ° sector (full circle) or 168°
sector (half circle). If the [SECTOR] control is operated following the selection of the
full-circle display, the next pressing of the [FULL/HALF] key presents the full-circle display.
Full circle
Sector set with
SECTOR control
FULL/HALF
key
Half circle
168
°
FULL/HALF
key
How the FULL/HALF key works