Ship Stability Video 69: Floating Cylinder
If an empty glass is kept floating on top of water, it is likely to float tilted. This is the loll position. If the glass however, is filled up with some liquid, it is likely to float upright. The bottom heaviness takes over the free surface effect. This is also a learning lesson for the people connected with Ro-ro ferries. Capt. S.S. Chaudhari in his series of videos on basic stability calculations attempts to illustrate this extremely important principle using a simple numerical.
Capt.S.S. Chaudhari