Colo; I didn't have a good way of indicating this, but the deckhouse behind it is meant to hold the missile drums in a modified, horizontal-loading ready-storage. (Given how much the CIWS seems to be ending up on my designs, this was suggested by someone else with a background in these sorts of things as a plausible modification that would assist in avoiding either very awkward arrangements or a very large CIWS blind spot.
Not a Chinook per-se, (again, a stand-in) but in the same size class, and a descendant of the thinking that in the 60's led to the Royal Navy studying twin-rotor ASW helicopters in that size class for operation off the abortive Escort Cruisers.
Does this ship have facilities for two Chinooks or are you just showing them for illustration purposes? I just think this ship would only have space for one large helicopter like it.
Two screws, in skegs - they are off the never-were Flight III Burke drawing that was updated relatively recently and is on the main site.
There are two Chinook-class helicopters - I worked out the beam and the clearances, and they fit - it is a bit snug, yes, but the hangar size checks out. The AAW version above carries two small or one large helicopter due to the constriction on the hangar by the boat bays.
That just seems like a hell of a lot of helicopter for an escort really. Why not a Seahawk or equivalent? I just can't think of any example in a modern navy that uses a helicopter that large, and from what I've seen nobody ships two of them...
I'd be interested to see someone who has "been there" chime in (like Shipright). I have a feeling you can probably physically fit both of the helicopters in there as you say but there's probably some efficiency concern that would prevent a force from doing so.