KN cross curves of stability

Same as the GZ cross curves and also used to get the GZ values for making the curve of statical stability.
The only difference being that here the KG is assumed to be ZERO.
This solves the problem of a sometimes positive and sometimes negative correction, as now the correction is always subtracted.

GZ = KN – KG Sine θ

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Differences between MC/MC-C and ME/ME-C engines

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