Ive been a MK41 VLS technition for 20 years in the US Navy. I can confirm that the three cell hatch was used as a folding crane for at sea missile unload and off load. The crane was a swiss design and became very difficult to get parts for. A few of the CG-47 class Cruisers had them removed, but all others built still have them in place are inactive now. The only exception being the AFT ones on DDG-51 class Destroyers for handling torpedoes from the lower flight deck up to the missile deck where the tubes are and all ships with them stationed in Japan because they load from a barge at anchor, and its only to handle gas management and support gear, NOT missiles.