Investigating Rivadavia's midships structures

What were the unusual structures between Rivadavia's wing turrets?

They were gooseneck crane supports, apparently also useful as platforms and physical barriers around the turrets.

Funnels can be ruled out, but the plans and photographs do not provide an immediate answer. The live investigation considers air intakes, radio or observation structures, searchlight platforms, and physical stops that might prevent the wing turrets from firing into one another. A viewer eventually finds a source identifying adjacent equipment as gooseneck crane supports. Later photographs suggest that the most conspicuous framework also carried platforms and may have served as a barrier around the turrets. The changing answer demonstrates source criticism in real time as better visual and documentary evidence arrives.