482
DOCK ENGINEERING.
Process of Overhauling a Self-Docking Floating Dock.
The manner in which a modern floating dock, constructed on Messrs.
Clark and Standfield’s system, undergoes a thorough overhauling is both
ingenious and interesting. It will be readily understood from an inspection
of figs. 467 to 474.
In the first operation the vertical sides are dealt with. The whole
structure is sunk, to the extent shown in fig. 467, by admitting water to
the side and floor compartments alike. The dock is then raised by
Fig. 468.
pumping out the floor pontoons alone. This brings it into the position
shown in fig. 468. Next, the water is allowed to escape from one of the
sides, and the dock takes a list sufficient to raise that side well out of
the water (fig. 469). Each side is dealt with in this manner. The dock
is then restored to level trim, with all its compartments empty (fig. 470).
The dock floor is next undertaken. It is formed of a series of pontoons
extending the whole internal width of the dock, and capable of being