The icon of the Coolidge 'The Lady' is situated in the first class dining saloon.
Make your way along the starboard side and drop down through the mid ship sea door or "Euart's door", through the lobby and into the first class dining saloon via the starboard door.
From here swim to the other end of the room taking in the ambient light from the double portholes to see the lady and give her a kiss for good luck.
Make your way back out of the wreck taking a look at some interesting artifacts on the way to the exit.
Thanks to Victor Hawk for the video!