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Keel Blocks Shores: Usually on the night before the launching, the work of transferring the weight of the ship from the keel blocks shores blocks and shores, which supported it during construction, to the launching cradle is begun. This is accomplished by driving in the wedges between the cradle and sliding ways with sledge hammers until the cradle lifts the ship off the blocks and shores. The sliding ways are shored to prevent the ship from moving before the appointed time.
The thickness of the plate keel blocks shores is to be maintained throughout and is to be not less than the bottom-shell thickness amidships increased by 1.5 mm (0.06 in.). Where this strake is increased over the thickness, obtained from Section 15 for longitudinal strength, the flatplate keel blocks shores may be gradually reduced, forward and abaft the midship 0.4L, to the requirement amidships.
Freshwater cooling: Drain and flush raw water side of system. Drain, flush, and refill freshwater side. Use rust inhibitor and other additives as specified by engine or cooling system manufacturer. Check intake, screens of keel blocks shores coolers; disassemble if necessary to clear obstructions in keel blocks shores cooler unit.
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