1-3
1.1.2
Shortening 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
1200 mm
stroke
1600 mm
stroke
Remove 130
thru 140 mm
from the
bottom.
Remove
less than
140 mm
from the
bottom.
Same as left.
Same as left.
Remove 130 to 140 mm
from the bottom.
Note that the length
"D" must be less than
1170 mm.
Remove less than
140 mm from the
bottom. Note that the
length "D" must be less
than 1570 mm.
Same as left.
Same as left.
D
D
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.
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