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5
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 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
800 mm Remove 297
thru 382 mm
from the
Same as left
Remove 297
thru 382 mm
from the bottom.
Note that the length
"D" must be less
Same as left
1200 mm Remove 97
thru 382 mm
from the
Same as left Same as left
D D
1600 mm
Remove within
282 mm from
the bottom.
bottom.
bottom.
than 1003 mm.
Remove 97
thru 382 mm
from the bottom.
Note that the length
"D" must be less
than 1203 mm.
Remove within
282 mm from
the bottom.
Note that the length
"D" must be less
than 1703 mm.
Same as left
Same as left
Figure 3-3 Guidelines for shortening the retraction tank
Note 1: In the 800 mm type hull unit, more than 297 mm must be removed from the bottom so
that the transducer fully protrudes from the tank. If more than 382 mm is removed, the trans-
ducer cannot be retracted into the tank.
Note 2: In the 1200 mm type hull unit, the transducer will not fully protrude unless 97 mm is
removed from the bottom, and cannot be fully retracted if more than 382 mm is removed.
Note 3: In the 1600 mm type hull unit, the transducer cannot be fully retracted if more than 282
mm is removed.
Note 4: When 382 mm (282 mm for 1600 mm type) is removed and “D” is minimum, the effect
of air foam is minimized because the transducer fully protrudes in water.