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A similar photo is in The Guthrie daily leader., June 10, 1920, HOME, Image 1 chroniclingamerica.loc.gov/lccn/sn86063952/1920-06-10/ed-... and in The Sun and the New York herald., June 13, 1920, Section 5 Rotographic Section, Image 60 chroniclingamerica.loc.gov/lccn/sn83030273/1920-06-13/ed-...

Both photos were likely taken at New York Navy Yard on the day of the battleship's commissioning, 3 June 1920. The deck view is taken from the ship's fantail looking forward. Note numerous visitors on deck, including women in formal attire, as well as photographers with tripods, indicating a festive occasion, yet a great number of shipyard workers dressed for work occupy most of the topside spaces above the main deck. The ship is incomplete -- scaffolding surrounds the main top, and calibration equipment is attached to the 14-inch guns of No.4 main batter turret. TENNESSEE was officially completed and delivered to the Navy on 16 September 1920.

Christopher Cavas follow photo link for article about commissioning ceremony.

the reason the Washington is crossed out is this ship was originally the Washington. On 9 November 1916, Washington was renamed Seattle (retaining her classification as Armored Cruiser No. 11). She was simultaneously taken out of reserve and recommissioned for duty as flagship of the Destroyer Force. She was probably renamed as the was a Battleship planned named Washington which was later scrapped under the 1922 Naval treaty. her long story is here en.wikipedia.org/wiki/USS_Washington_(ACR-11)

What are the things attached to the gun barrels with leather straps? Would they stay in place when the gun was fired?

I don't think those are leather, I think they are metal claps, they seem to be holding a mirror for the gun layers or sight setters. the rear "rings" are part of the barrel. Here is a very detailed description of how the guns are manufactured www.bobhenneman.info/HeavyGun.htm

The super hi-res version of this image and the others in the Seattle series show stitching on the straps. Metal clamps probably would have damaged the surface of the guns (and they loved these things too much to damage them). I thought the barrels were built up with telescoped sections at first, too, but the other images show they're one piece from end to end. The shadows of the straps play tricks on us. This image shows the shadows being cast on the opposite side of the straps. Every strap can also be followed to a fitting somewhere on the barrel.

Very interesting picture and the commentaries do let us know what exactly is going on, thank you all.

It's probably a cruiser; it looks a bit small for a dreadnought anyway, and the all big gun nature of the armament would rule out a pre-dreadnought battleship.

Well, sadly it's not HMS King Edward VII, whose sailors we encountered before here. But similar - spot the differences ...

Actually, maybe it is a pre-dreadnought. It looks quite like HMS Goliath. Or HMS Formidable. Edit: Or indeed quite a large number of late pre-dreadnought classes. e.g. upload.wikimedia.org/wikipedia/commons/6/65/HMS_Montagu_%...

Looks like it was moored somewhere around here

Here's a record of HMS Ocean (a Canopus-Class battleship) in Castletownbere in 1905 www.plymouth.gov.uk/edwardianphotos/notice824.html