Cruise ship lifeboats are not "self-righting", meaning they will not roll back upright. They are also "semi-enclosed", meaning that if the boat is landed in an attitude that the gunwale is underwater on one side, it will fill with water, and the boat covering will also act to scoop water into the boat, and continue the roll of the boat to inverted.
Now that is scary, so if a lifeboat filled with people lands sideways, everyone has to evacuate it, pronto.
Scary thought.