There's a generator at the bottom of the ship with a Fusion Core. Navigate your way through the container vans and make your way to the upper deck. The control room on top of the deck has an Expert terminal. This terminal controls the spotlight and turrets on the current deck so make sure to use this if you're able to.
Go to the barricaded part of the ship. There's an issue of Tales of a Juntown Jerky Vendor on the table with a parasol and chairs.
There's a named raider (Rags) inside the shack at the bow of the ship. There's a Stealth Boy on the toilet below the shack. In his room, you can find a mini-nuke on top of a yellow wooden crate. The Expert terminal here has the same spotlight and turret control as the other terminal.
There's also a chem station, a green steamer trunk, and the Agility Bobblehead at the edge of the wooden floor at the bow of the ship. It's hard to see so get near the edge to get the make of it. To get down, you can use the boat lift nearby.