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. There are two automatic scan range, WIDE and NARROW, which can be selected by the INIT SET/TEST menu. Note that the NARROW is under develepment.
Table
OTHER/INIT SET/TEST menu
Range (m) | Width (1) | Width (2) | Width (3) | Period |
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60, 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° | " |
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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/INIT SET/TEST menu
Range (m) | Width (1) | Width (2) | Width (3) | Note: Period equals | |
60, 100 | ±4°* | ±6°* | ±8°* | one transmission. | |
150, 200 | ±2° | ±4°* | ±6°* | Tilt angle changes | |
300, 400 | ±1° | ±2° | ±4°* | in 2° steps for aster- | |
500, 600 | " | " | ±3° | ||
800 | " | " | " | ||
width; 1° steps for | |||||
1000 | " | " | " | ||
all other widths. | |||||
more than 1200 | " | " | " | ||
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