Yangtze-31

The  is a location in Fallout 4.

Background
A Yangtze-class submarine stuck in Boston harbor, the Yantgze-31 is helmed by Captain Zao of the Chinese Navy. During the Great War, the Captain launched the six high-yield nuclear ballistic missiles against the Commonwealth, as ordered. However, when they tried to retreat, the Yangtze struck a sea mine and wound up moored in Boston Harbor, mere inches under the surface. Luckily for them, the burning Boston cared little for those who just nuked it - and so, the submarine remained stuck in the harbor, slowly deteriorating, its crew turned into ghouls and worse.

Exterior
The submarine is hidden just beneath the surface of the water, among ship wreckage and flotsam. It can be identified by the periscope rising upwards to scan the skyline for hostiles.

Interior
The submarine is built around the forward nuclear reactor. The player enters through the conning tower, which connects to the bridge (with Captain Zao) and through it, to the rest of the ship. The primary deck is divided into two halves: The upper and lower decks, with the reactor smack right in front of them occupying both levels.

Beyond the reactor, the upper decks contain a small lab with a chemistry set, a large mess hall, pantry, kitchen, and living quarters for the crew, as well as a small security station and infirmary. The decks below contain the forward machine shop, launch tubes (with an exposed ICBM ripe for scavenging), the armory and storage holds and right under the reactor control room, the primary turbine.

Inhabitants

 * Zao
 * Crewmate
 * First mate

Notable loot

 * Fusion core
 * Mini nuke
 * Homing beacons

Appearances
appears only in Fallout 4.