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 TM 55-1905-221-14-1
b. Raw (sea) Water Cooling Systems. These systems (fig. 1-7) provide cooling for the mufflers and priming for the
bilge pumps. Sea water intake is at the sea chest which is in the hull adjacent to the fresh water heat exchanger.
There are separate systems for each propulsion unit. Each system includes two raw-water pumps which are
mounted aft on the engines. Raw water is pumped through sea mufflers and discharged with the exhaust. Sea
water strainers (mounted in the engine room) are connected in the intake lines between the sea chests and the
pumps.
Figure 1-7. Raw (Sea) Water Cooling System.
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