Walk up to the board with W A S D and look around with the mouse. Click a document to lift it off its pin, and click again to hold it up and read it. On the ledge: a telephone, a wireless set and a telegraph key you can hold down to transmit.
The wireless is sending a message. Copy it onto the scrap of paper on the board by sending each letter, in order, on the telegraph key. There’s a code card pinned up if you need it. Finish the message and listen for the telephone.
Every document is real, from your Titanic asset folder. Sound includes the sea, the ship's timbers and the wireless; turn your volume up.