The shed in front of it has a Power armor station. There are bloodbugs in the entrance of this location. The main rooms have nothing notable to loot, only common junk. Make your way to the actual shipyard where you'll hear a looping message. There's also a lone mirelurk hunter here.
To the SW, you'll find an armor workbench. The green steamer trunk is located on the dry dock to the SE, guarded by adult mirelurks, some are buried, waiting to ambush you. Rory's body is found near the steamer trunk. You can loot the Irish Pride Key from her body.
The boat's main cabin has an issue of Taboo Tattoos on the dining table in the main cabin. In the boat's bridge, above, you can find the terminal containing log entries and an option to turn off the announcements.