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 TM 55-1905-223-SDC
5-31.
WATERTIGHT INTEGRITY. The maintenance of watertight integrity is essential to developing full
resistance to underwater damage. It is essential to maintain the watertight bulkheads and watertight doors
(including doors to main deck storerooms, damage control locker, and the paint locker).
PROCEDURE AFTER DAMAGE.
5-32.
CAUTION
Every effort should be made to confine the flooding.
STEP ONE
ESTABLISH FLOODING BOUNDARIES as close to the area of damage as possible.
STEP TWO
DEWATER ANY FLOODED SPACES ABOVE THE MAIN DECK whose boundaries can be made
sufficiently tight. First action should be to drain off any flooding water which may have entered the main deck
storerooms if this can be made sufficiently watertight.
STEP THREE
SIZE UP THE SITUATION before taking further action. As previously stated, there is every
expectation of survival after any single compartment has been flooded, provided the limiting drafts were not
exceeded prior to damage. Even after such damage, the principal danger is not the loss of stability but the
loss of reserve buoyancy. Under any condition of damage in which the ship remains afloat, there is little
danger of experiencing a negative metacentric height. The principal task, therefore, is to regain buoyancy.
STEP FOUR
ELIMINATE OR REDUCE LIST. Since the SW Ballast Tanks 1 and 2 are not cross-connected, it is
expected that the ship will develop a 7-10list after damage to one of those tanks. Assuming that the spaces
above the main deck have been dewatered to the greatest possible extent, the next action should be to drain
any low spaces which may be PARTIALLY full. If circumstances permit, this procedure may be applied to
diesel oil as well as any damage water which may have entered these spaces. If any spaces below the main
deck are COMPLETELY full, they are best left alone for the time being.
After these preliminary operations have been carried out, attention may be turned to further reduction
of list. Since any list after damage will be due probably to shifting of solid weight rather than negative
metacentric height, the problem is a relatively simple one for the LCU. There are several methods of reducing
list and these are indicated below in the approximate order of desirability for the LCU. In general, any method
which involves a lightening of displacement should be favored over one which would increase displacement,
particularly if structural damage has been severe or if bad weather is prevailing at the time.
5-14
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