I rotated and expanded the image focusing on the rear bulkhead. The "rectangular" boxes are actually hand "grab" rails. Also, note there is a step down from the pilot house into the chart room.
In the BIW Engineering drawings, there are two more Bridge layouts for other later ROUND BRIDGE FLETCHERS. The chartroom layout was revised each time and I suspect kept changing as more equipment kept being added to the ships. But, I didn't notice changes to the pilot house layout.
Les,
The first Federal-built FLETCHER class units (DD445-448) built had the searchlight platform on the aft stack and the floater net "baskets" built with wood slats were installed by the Navy Yard on both the front and aft edges of the searchlight platform(s) ... I posted some images on this earlier that showed the early basket. One of the things the USN did was play with where best to put floater net baskets. I read an interesting memo about the early practice of tying floater nets at the deck edge for easy access by crews in the South Pacific. But, officials wanted them up out of the way, fearing fouling crew movements. On units delivered after DD-448 well into 1943, the floater net baskets were deleted from the searchlight platforms as completed. Even when the searchlight platform was moved to the forward stack initially no floater net baskets were installed on the searchlight platform. On the West Coast as the destroyers were overhauled/upgraded in mid-late 1943, either the metal round contoured basket (see FLETCHER's 1943 image above) or the metal straight basket were installed on the searchlight and 40-mm director platforms. When completed and at least into March 1943, FLETCHER had the wood slat floater net baskets on both the front and aft edges of the searchlight platform. On at least RADFORD in early 1943, the baskets forward of the searchlight platform were removed. On the other hand, the early BIW-built units (DD449-451) did NOT have ANY floater baskets on the searchlight platform from completion until being upgraded with five twin 40-mm mounts.
I have not tried to figure out when baskets were moved or added, because it happened often. Best to try and find photos of the ship you want to model for the time period and use that configuration or take a guess based on sisters at that time.