From Narciki

A vessels **radius of gyration** (K) is a measure of it's mass distribution about the axis of rotation under consideration. It can be calculated by taking the root-mean-square of the mass distribution;

- SQRT( (Σ[mass x distance]
^{2})/Δ) )*units are length, i.e., meters*

Moving weights further outboard increases a vessels radius of gyration.

- Longitudinal/Pitching (K
_{L}): 0.25 x Length(pp) - Transverse/Roll: (K
_{T}): 0.35 x Breadth