The requirements of this Chapter relate, in particular,
to formulae for determining the diameters of shafting for main propulsion
installations, but requirements for couplings, coupling bolts, keys,
keyways, sternbushes and other associated components are also included.
The diameters may require to be modified as a result of alignment
considerations and vibration characteristics, see
Pt 5, Ch 6 Shaft Vibration and Alignment, or the inclusion of stress raisers,
other than those contained in this Chapter.