1.1.2Shortening the retraction tank
The retraction tank is 1300 mm in length when supplied. Shorten the tank as necessary so that the transducer is placed well below the keel when it is fully lowered. The following table provides guidelines for shortening the tank. Refer also to the retraction tank installation drawing at the back of this manual.
Installation
Method
XDCR Travel | D | D |
|
|
| Remove 130 | Remove 130 to 140 mm |
| |
| thru 140 mm | from the bottom. |
| |
1200 mm | from the | Same as left. Note that the length | Same as left. | |
bottom. | ||||
stroke | "D" must be less than |
| ||
| 1170 mm. |
| ||
|
|
|
| Remove |
| Remove less than |
| |
|
| 140 mm from the |
| ||
| less than |
| Same as left. | ||
|
| bottom. Note that the | |||
1600 mm | 140 mm | Same as left. | |||
length "D" must be less |
| ||||
from the |
| ||||
stroke |
| than 1570 mm. |
| ||
| bottom. |
|
| ||
|
|
|
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Guidelines for shortening the retraction tank
Note 1: In the 1200 mm stroke type hull unit, the transducer will not fully protrude unless the tank is shortened by at least 130 mm from the bottom, and cannot be fully retracted if more than 140 mm is removed.
Note 2: In the 1600 mm stroke type hull unit, the transducer cannot be fully retracted if the tank is removed more than 140 mm.
Note 3: When 140 mm is removed and “D” is minimum, the effect of air foam is minimized because the transducer fully protrudes in water.
