plawolf
Lieutenant General
You are right, doesn't mean one can't launch a TAS from the mooring line opening. However, I think a dedicated TAS opening has rollers on the edges to facilitate with launch and recovery of a TAS?
I believe the rollers help to cut down on the wear and tear on the array by reducing the friction, which is why they are adding them to later built designs.
More importantly, it seems the 056 program either had several variations planned early on as you say or there is more modifications going on. Just compare the two. 597 clearly doesn't have that supposed TAS opening compared to 583. And for these two vessels, they have their upper smokestack painted black. Don't think some of the others do. Makes me wonder if there is any pattern depending on which shipyard built the vessel.
I'm not so sure if its a case of modifications or refinements. Looking at the development of the project, you get the distinct impression that the design was rushed into production, and the running improvements done to ships even as they were still being built reinforces that impression.
Based on that, I get the feeling that things like the redesigned smoke stack, redesigned openings at the stern of the ship and things like the dedicated TAS ports are just a case of the designers dotting the 'i's and crossing the 't's after they had got the first draft in under the deadline and now have some time to polish things off.
For something as major as retrofitting TAS and all the associated back end processing equipment, you would need to significantly rearrange the internal layout of the area under the helo deck, and there is just nothing to suggest that redesign work of that magnitude had taken place. There are no external differences other than the dedicated opening itself, and the pace of construction had not slowed down in any noticeable way to indicate that they reworked the internals.