The double hull of a submarine is different from a ship's double hull. The external hull, which actually forms the shape of submarine, is called the outer hull, casing or light hull.

In submarine hulls, the double hull structure is significantly different, consisting of an outer light hull and inner pressure hull, with the outer hull intended more to provide a hydrodynamic shape for the submarine than the cylindrical inner pressure hull. It was introduced in the late 1890s by Maxime Laubeuf on French submarine Narval.

Submarines can be divided into those with a Single Hulls and those with Double Hulls. The former has only one layer of steel between the crew and the open ocean while the latter has an external outer hull which completely encases the occupied inner hull.

双壳潜艇是指有两层壳体的潜艇，即外围是非耐压仓（可储水），内部是耐压仓，保护设备与人员。 体积庞大，排水量大，自重大，储备浮力高，耐压性能好。

Soviet submarines differ from their U.S. counterparts. One major difference is that the USSR continues to build submarines of double-hull construction, a practice abandoned by the U.S. in the mid-1960s. Critics of Soviet technical prowess and innovation cite this fact as evidence of extreme conservatism by Soviet submarine designers.

2023年8月4日 · Submarines can be divided into 2 classes by construction, these are single hulls and double hulls. The single-hull submarines have only one layer of steel between the crew and open ocean while the double Hull has an external outer …

2019年5月17日 · Submarines are underwater self-propelled crafts that are designed and built to perform underwater operations for a stipulated amount of time. The submarine design consists of a single or double-hull system that houses all the necessary systems and manpower required for completion of their mission.

2024年12月16日 · The new Laubeuf design was a truly double-hull type with the pressure hull completely surrounded by external tanks. In 1905 the German Navy placed an order for its first submarine U1, of the Germania-Krupp type, which was a combination of the old Laubeuf externals and a controlled flooding superstructure.

All post-World War II heavy Soviet and Russian submarines are built with a double hull structure. American and most other Western submarines switched to a primarily single-hull approach.

The double hull of a submarine is different from a ship's double hull. The external hull, which actually forms the shape of submarine, is called the outer hull, casing or light hull.