A couple other items that occurred to me:
That pipe on the stern crane's cables looks to be a removable thing that isn't visible in all earlier photos of Nevada. However, it is present in all the attack and aftermath shots.
Based on the uniformity of color between the planking and the metal fittings and plates in the attack aftermath photos, this being a prime example:
http://www.navsource.org/archives/01/013632.jpgI'd say the Nevada's wood deck was painted. What color, I have no idea. A medium blue or blue-gray perhaps.
Regarding the 5-D on Oklahoma, something I've been wondering: Wasn't it a collision with the Oklahoma that sent Arizona into the drydock for the visit that provided the possibility for her to be repainted in 5-S? If so, wouldn't the Oklahoma also need a drydock visit, affording the same repaint opportunity? Yet no one seems to dispute the Oklahoma's 5-D. (Granted, people often ignore the Oklahoma anyway. And maybe she was't banged up enough to need the drydock. Just something I've been puzzled over. If Oklahoma *did* go to drydock, and she wasn't repainted in 5-S, maybe Arizona wasn't either. Ah, the vaguaries of the final months of 1941 at the Pearl Harbor naval base - which matter not a whit to any but us ship geeks.

)
In regard to the bow wave: We know Nevada had it. I haven't seen any shots of Oklahoma above water from the correct time period to prove or disprove it, and just because one sister had something doesn't gurantee the other did - see all the differences we've been discussing! But if she
did have it, might Arizona, as the final member of the battle division all three ships were in, have also had a bow wave? (None of the ships in other BatDivs had them that I've noticed) All the photos I see of Arizona at the right time period are either distant, grainy Japanese photos, or shots where her bow is already submerged. If two members of a group look like they're speeding along, and the third looks like it's sitting still, it's not going to take long to realize that they're not actually changing position relative to each other. But it also allows for that moment of misjudgement. (I'm probably overthinking this - but the "why on this ship and not on the other" question makes me do that.)
Having recently noticed this on the Arizona and Pennsylvania build a club mate and I are working on, a check of photos revelas that there are also external avgas lines on Nevada both sisters. One side only on each, extending low on the bow to deck near the stern, and not following identical bend patterns.
Oklahoma had hers on the starboard side. See:
http://www.navsource.org/archives/01/013718.jpgAnd in this shot she has both the avgas line and the degaussing cable:
http://www.navsource.org/archives/01/013701.jpg(Could add this to the artwork)
Nevada had hers on the port:
http://www.navsource.org/archives/01/013698.jpgI can't see it in the photos after she was raised, but then her port side is so cruddy it's hard to see any detail.
- Sean F.