Furuno MODEL CSH-73 - Manual (Page 45)

7-1
ADVANCED LEVEL OPERATION
Finding Fish School Center
When you want to find the center depth of a fish school, use the
auto tilt function, which automatically scans the tilt angle within
the selected width.
Table 7-1 Automatic scan range at menu setting WIDE of OTHER
sub menu in the INIT SET/TEST menu
Range (m) Width (1) Width (2) Width (3) Period
75, 100
150, 200
300, 400
500, 600
800
1000
more than 1200
10
°
"
"
8
°
6
°
4
°
2
°
16
°
"
"
"
12
°
8
°
4
°
20
°
"
"
"
16
°
12
°
6
°
every 6 transmissions
every 4 transmissions
every 2 transmissions
"
"
"
"
For example, when the RANGE control, TILT lever and WIDTH
key are set to 800 m, 8
°
and width (1), respectively, the tilt angle
varies at every transmission as follows:
8
°→
8
°→
10
°→
10
°→
12
°→
12
°→
14
°→
14
°→
12
°→
12
°→
10
°→
10
°→
8
° →
8
°→
6
°→
6
°→
4
°→
4
°→
2
°→
2
°→
4
°→
4
°→
6
°→
6
°→
8
°→
8
°
Figure 7-1 Tilt angle setting
Table 7-2 Automatic scan range at menu setting NARROW of
OTHER sub menu in the INIT SET/TEST menu
Range (m) Width (1) Width (2) Width (3)
75, 100
150, 200
300, 400
500, 600
800
1000
more than 1200
4°
*
2°
1°
"
"
"
"
6°
*
4°
*
2°
"
"
"
"
8°
*
6°
*
4°
*
3°
"
"
"
Note: Period: every transmission
Tilt angle changes in 2
°
steps for asterisk-marked widths; 1
°
step for all other widths.