It looks like the UZO was only stabilized for fore-and-aft motion, but not for side-to-side motion. I also question how effective it would be in very heavy seas since it is the crewman who has to keep the thing level:

By
captain_joch at 2011-03-02

By
captain_joch at 2011-03-02

By
captain_joch at 2011-03-02