PLATING
PILLOW
J-TYPE
HOOK BOLT
WASHER
NUT
T-TYPE
L-TYPE
J-TYPE
PLANK
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A
B
Figure 8-5. A. Types of hook bolts; B. Use of hook bolts in applying a patch.
Ordinary feather pillows have a tendency to ball
up when they are wet and do not provide a uniform
surface when used to patch holes. For this reason
WASHER
some ships may fabricate pillows made of canvas and
NUT
oakum.
HINGED
JOINT
You will frequently find it necessary to improvise
T
patches by using whatever material is handy. This
calls for skill and a certain amount of imagination.
PLANK-
CANVAS (STUFFED)
DRILLED
OR PILLOW
Hinged or folding prefabricated patches are usually
THE T CAN BE FOLDED TO
the easiest to use, and, in many cases, they are the
GO THROUGH A SHELL HOLE
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most effective. But if they are not available, you will
need to improvise patches.
Figure 8-7. Materials used in assembling a folding T patch.
HULL
PLANK
REVIEW QUESTIONS
Q4.
What holes caused by battle damage should
be given priority when plugging is needed?
1.
All large holes
2.
All small holes
PILLOW
2 INCH X 4 INCH
3.
Holes in the deck
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STRONGBACK
Figure 8-6. One method of installing a folding T patch.
4.
Holes at the waterline or on the low side
8-7
