On the recreational deck, where are all the pictures I have to check to find the code for the transmitter?
The code itself is:
The pieces are scattered across four art terminals around the level - you'll need to interact with them and cycle through the images on each to find them, though if you know the code, you don't need to bother.
The three terminals are located:
Just west of the main elevator in Recreation A, in a small room on the Northeast corner of the upper level of Recreation A, in the two-level lounge on the southeastern corner of Recreation B, and in the Artechnology store on the upper level of the Mall section of Recreation C.