Furuno CH-250 - Manual (Page 22)

2-4
2.4 Selecting Sector Width
Sector means the width of the transducer training.
96
°
Display sector
(shown: 96˚)
Figure 2-4 Display sector
The [SECTOR] control selects 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.
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 selects 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
Figure 2-5 How the FULL/HALF key works