()with various arrangements of barrels are the usual mooring equipment used on board ships.
The piston crown employs the usual jet-shaker principle with an arrangement of cooling bores in the crown so that the surface temperatures of the crown are moderate with a very even distribution()
The usual method of effectively applying foam on a fire is by ().
Before "stand-by" is rung on the engine telegraph, it is usual to give the main engine () ahead and astern.