Furuno CH-250 Installation Manual page 20

Guideline for the installation on a steel or aluminum hull
When the retraction tank is installed on a steel or aluminum hull, follow the guideline shown
below and see the outline drawing at the back of this manual.
•
The flange of the retraction tank must be parallel with the waterline.
•
Fit a doubling plate (a plate to reinforce the hull plate) of 600 mm or more diameter to the
outside of the hull plate (see the figure below). For the doubling plate, use the same material
and thickness as hull plate.
•
Weld four reinforcement plates to the retraction tank.
Li: The length of the tank
Hull plate
Retraction tank
Doubling plate
Doubling plate:
Fit it to the outside of the hull plate.
10
Hull plate
Reinforcement plate
Bow
Thickness (t): More than hull plate
(Unit: mm)
t