Furuno MODEL CSH-73 manual Advanced Level Operation, Finding Fish School Center

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	10°	16°	20°	every 6 transmissions
150, 200	"	"	"	every 4 transmissions
300, 400	"	"	"	every 2 transmissions
500, 600	8°	"	"	"
800	6°	12°	16°	"
1000	4°	8°	12°	"
more than 1200	2°	4°	6°	"

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	4° *	6° *	8° *
150, 200	2°	4° *	6° *
300, 400	1°	2°	4° *
500, 600	"	"	3°
800	"	"	"
1000	"	"	"
more than 1200	"	"	"

Note: Period: every transmission

Tilt angle changes in 2° steps for asterisk-marked widths; 1°

step for all other widths. 7-1