Yangtze-class submarine

Yangtze-class submarines were one of the proudest achievements of the Chinese technological thought, capable of penetrating enemy defense lines at sea and delivering crippling nuclear strikes at a moment's notice.

Overview
The Yangtze-class boasts an unorthodox design. While nuclear submarines usually adopt a cigar-shape, to distribute the load throughout the hull, this class of submarines consists of a large forward section with the three primary propellers, built around the nuclear reactor powering the vessel and the ballistic missile launch tubes. All of the crew quarters, machine shops, and other facilities necessary for extended operations are contained within. By comparison, the middle and aft sections are much smaller. The sail contains the primary access hatch and the periscope, and connects directly to the bridge, which also doubles as the access point to the primary decks of the submarine. The aft section of the submarine contains only a propeller and steering rudders.

Designed for the Ghost Fleet at Shaanxi around 2075, the class' stealth capabilities are superb and allowed at least one of these vessels, the Yangtze-31, to reach the eastern coast of the United States, evade detection, and deliver a crippling blow to Massachusetts.

Appearances
A single submarine of this type, the Yangtze, appears in Fallout 4.

Behind the scenes
The Prima strategy guide erroneously refers to the submarine as a Liao-Class Type 113 submarine.