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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 positions 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 280
- 290 mm
from the
bottom.
Remove
less than
290 mm
from the
bottom.
Same as left.
Same as left.
Remove 280 - 290 mm
from the bottom.
Note that the length
"D" must be less than
1170 mm.
Remove less than
290 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: For the 1200 mm stroke hull unit, the transducer will not fully protrude unless the
tank is shortened by at least 280 mm from the bottom, and cannot be fully retracted
if more than 290 mm is removed.
Note 2: For the 1600 mm stroke hull unit, the transducer cannot be fully retracted if the tank
is removed more than 290 mm.
Note 3: When 290 mm is removed and “D” is minimum, the effect of air foam is minimized
because the transducer fully protrudes in water.