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 TM 55-1905-223-24-18-1
1-29. Oily Water Separator Piping System. The oily water separator piping system
consists of a three-stage coalescer oil-water separator with pumps, motors and oil
content alarm. The system separates and removes nonsoluble oil, solids, and
entrained air from the bilge water before it is discharged overboard. System
control is maintained through a combination of valves as shown in FIGURE 1-17.
Power for the oil water separator is supplied by the MISC MCHRY POWER PANEL P204. A
running indicator is provided on the engine room console panel.
1-30. Sewage Piping System. The sewage piping system collects and routes ship's
sewage to the sewage treatment device and then to a through-hull overboard
discharge. The sewage treatment device uses natural bacteria to decompose solids in
the sewage. The decomposed sewage is then treated with chlorine prior to overboard
discharge. The sewage treatment device is supplied with power by the MISC MCHRY
POWER PANEL P204, through a 240/120 Vat step-down transformer. Controls for the
sewage treatment device are located on the unit.
1-31. Propeller Shaft, Propeller, and Shaft Brake. The propeller shaft transfers
power provided by the main reduction gear and clutch to the propeller, which
converts it to thrust required to move the vessel. The shaft brake stops and holds
the propeller shaft when no torque is applied. The shaft is connected to the main
reduction gear via the propeller shaft flange. The shaft is lubricated by water
from the stern tube lubrication piping system. The air actuated shaft brake stops
automatically actuated. Shaft locks allow manual locking of each shaft.
1-32. Doors, Hatches, and Scuttles. Doors, hatches, and scuttles provide access to
spaces of either privacy, security, o r watertight/firetight integrity. I n t e r i o r
doors primarily provide access between above main deck interior spaces where
security or watertight integrity is not a concern. Watertight doors provide access
to interior spaces from weather spaces and to compartments where watertight
integrity is a requirement. Hatches provide access to below main deck areas.
Hatches offer watertight integrity when closed and dogged. When open, hatches allow
transfer of equipment and personnel between decks. Scuttles provide emergency or
restricted access to below deck engineering spaces. Dogged watertight doors are
fitted to the bulkheads at each end of the tunnel. Flush access hatches are used on
the cargo deck.
1-33. W o r k b o a t / L i f e r a f t s . The workboat functions as the utility small craft for
operations such as sea rescue and personnel transport. T h e rigid, inflatable
workboat has a 40-horsepower outboard motor. It is deployed and retrieved with an
electrical winch crane. The electrical winch operates off ships power at 230 Vac,
three-phase, 60 Hz. The unit is capable of 360-degree noncontinuous rotation. A
hand crank is provided for manual slewing. The liferafts are designed for compact
storage aboard ship and for quick inflation when necessary to abandon ship or for
use in other emergencies. The liferaft is inflated by pulling on the "Automatic
Painter." The liferaft release mechanism will automatically actuate if the ship
sinks, due to pressure at 15 to 20 feet. The container is inherently buoyant and
floats to the surface.
1-34. Airports, Fixed Lights, and Windows. All glass onboard the LCU is heat
treated and readily replaceable aboard ship. All windows, airports, fixed lights in
exterior doors, glass doors, and panels (except pilothouse windows, which cause
l i g h t to reflect on the structure) are provided with deadlight covers, light
excluding shades, lined drapes, or other devices. Removable insert screens are
1-64
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