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 TB 55-1900-231-15
Avoid breathing chlorine vapors for a prolonged period as they are hazardous to health and can
be fatal.
Follow the safety precautions posted on chlorine containers.
C. Prior to floating the watercraft, accomplish the following:
(1) Ensure that the HLPS or SSB watercraft communication and electronic equipments are in working
order.
(2) Ensure that there are no openings in the hulls that will allow sea water to enter the interior of the
vessels. The sea water suction and discharge valves should not be opened until the watercraft are
waterborne.
(3) Open diesel fuel valves (suction and discharge) to the engine fuel pumps.
(4) Open the suction and discharge valves on the engine fresh water systems.
(5) Insure that all rudder and shaft locks have been removed.
(6) Insure all raw water pump impellors are installed on engines so equipped.
D. The watercraft are ready for floating off the HLPS or SSB vessel Communications between the watercraft
and the vessel control are essential (recommended hand held radios) and shall be established before the
(HLPS) vessel starts flooding down. When watercraft are refloated after having been drystored the
following precautions shall be adhered to.
(1) Soon as water touches bottom of the watercraf, the crew shall continuously check the interior to
t
establish the watertight integrity of the craft. With coordination between all respective watercraft and
the (HLPS) or SSB vessel control, the watertight integrity of each watercraft shall be established
prior to floating free. This will reduce the time for the (HLPS) or SSB vessel to pump back up should
flooding occur in a watercraft.
(2) The stern tube shaft packings warrant special attention. Having been dry stored, the packings will
have dried out to some extent, causing abnormal leak-off at first and may require adjustment. The
packing will absorb moisture and swell after a period, requiring readjustment prior to turning the
shaft/shafts.
(3) Open sea valves, vent raw water systems and check for leaks. This can be accomplished
concurrently with (1) above. Once the integrity of the raw water systems are established, light off for
activation/test can commence. The activation/light off shall be accomplished IAW normal
procedures for the design watercraft and applicable Technical Manuals and Publications which are
on board each watercraft.
4. Manhour Requirements, Materiel and Special Equipments:
A. Manhour requirements and materiel estimates for HLPS watercraft are by design and number of units as
indicated in (1), (2), (3) and (4). Manhour requirements for the Officer In Charge (OIC) are depicted in (5).
The number of positions shown in (1), (2) and (4) are the personnel available for each unit to activate
within 48 hours. In (3) the number of positions shown is that required to activate 10 units. The positions
shown in (3) will be available for a total of 1440 hours. Although only 180 manhours are required to
activate ten (10) units, the remaining 1260 manhours should be utilized by the OIC to provide for relief of
other crews prior to float off.
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