Original design JSS had a deck higher than it is now.
Hence the I mast standing on a "foot" so the seastar and smile can look over the funnels.
Interesting, any images/source of this? as far as I know, the mast was raised indeed to clear the funnels although even now, the funnels are neatly 45 degrees away from the mast, which suggests the I-mast systems do not just look OVER the funnels but also between them.
The current JSS is also heavy in the bottom making her unstable in seas by pulling herself upright swift and quick.
That sounds like a clear case of TOO stable (Too high an metacentric height), does this only happen when the ship is sailing with full fuel tanks or also when empty?
Anyways, I would have to research the impacts of the dock on the hulls center of gravity, the JSS being bottom-heavy suggests that the bigger superstructure could work, but if the fuel tanks remain empty as a dock ship and she is then a lot less stable......