FMS Northern Star is a huge shipwreck occupied by gunners and mirelurks. Here, you find several interesting and valuable items.
On the table, on the upper deck, you find an issue of Tales of a Junktown Jerky Vendor.
On the ship's bow, in the outmost point, on the edge of the plank, you find an Agility Bobblehead.
Additionally, inside the ship, there are 2 fusion cores, a Stealth-Boy and a mininuke.