Balao class | Trackpads Warship Archive

Pearl Harbor, Hawaii (Oct. 5, 2004) - Marisco Ltd. workers repair the aging hull of the decommissioned Balao-class submarine USS Bowfin (SS 287) at their shipyard near the former Naval Air Station Barber's Point, during… — Pearl Harbor, Hawaii (Oct. 5, 2004) - Marisco Ltd. workers repair the aging hull of the decommissioned Balao-class submarine USS Bowfin (SS 287) at their shipyard near the former Naval Air Station Barber's Point, during a restoration project.This image was released by the United States Navy with the ID 041005-N-3019M-004 (next) . This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing . العربية ∙ বাংলা ∙ Bahasa Indonesia ∙ Bahaso Jambi ∙ Deutsch ∙ Deutsch (Sie-Form) ∙ English ∙ español ∙ euskara ∙ فارسی ∙ français ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ മലയാളം ∙ Plattdüütsch ∙ Nederlands ∙ polski ∙ پښتو ∙ português ∙ русский ∙ slovenščina ∙ svenska ∙ Türkçe ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− · Public domainImage source

TypeFleet Submarine

CountryUnited States

NavyUnited States Navy

EraWorld War II

Ships completed120

Ships planned182

Construction began1942

Construction ended1948

Overview and historical setting

The Balao class was the most numerous U.S. Submarine class of World War II and the direct wartime successor to the Gato class.

The class belongs to the history of submarines and served during World War II. Submarine design is shaped by the tension between underwater endurance, speed, depth, sensors, weapons, habitability, and the need to remain difficult to detect. Changes in propulsion and mission systems can transform the operational meaning of a class even when the basic hull family remains recognizable. For Balao class, the documented mission set included attack-submarine operations, interdiction of maritime trade, and long-range patrol.

Development and design

The design retained the Gato arrangement but used higher-yield hull steel, raising test depth from roughly 300 to 400 feet while preserving the long-range fleet-submarine concept. The program chronology records design work beginning in 1941, construction beginning in 1942, and the documented construction period ending in 1948. Program totals list 182 planned, 182 ordered, 122 laid down, 120 completed, and 62 cancelled. These dates and totals distinguish the design program from the number of ships that were actually completed and entered service.

The design evidence for Balao class identifies diesel electric, fleet submarine, and increased test depth and attack-submarine operations, interdiction of maritime trade, and long-range patrol. These features connect the class's technical arrangement to the work it was expected to perform for United States Navy. Later refits, revised sensors, new weapons, and changes in doctrine could alter the practical capabilities of individual members without changing their class identity.

Technical character

The As completed configuration is presented as the as-completed configuration. Its listed characteristics include displacement 1,550 metric ton (surfaced), displacement 2,453 metric ton (submerged), length 95.02 m, beam 8.31 m, and draft 5.13 m. The recorded armament is 10 × 533 mm torpedo tubes; 24 torpedoes; deck gun. The figures describe one documented state and may not apply unchanged throughout the subject's service life.

Technical data for Balao class is most useful when tied to a date and mission. Displacement changed with fuel, ammunition, electronics, weapons, and later modifications; speed and range depended on operating conditions; and sensors or armament could vary substantially between members and periods of service.

Ships of the class

The documented roster contains 122 members. These include USS Balao (SS-285), USS Billfish (SS-286), USS Bowfin (SS-287), USS Cabrilla (SS-288), USS Capelin (SS-289), USS Cisco (SS-290), USS Crevalle (SS-291), USS Devilfish (SS-292), USS Dragonet (SS-293), and USS Escolar (SS-294), with 112 additional documented members. The sources reviewed do not establish this as a final class total, so the roster should be read as time-specific.

Individual ship histories are needed to show how a common design diverged through construction differences, refits, damage, transfers, new assignments, and final disposition. For a ship-level view of the class in service, see USS Pampanito, whose profile follows the evidence available for one member of Balao class.

Service history

One hundred twenty boats were completed. Nine were lost during World War II, while the surviving class formed a major part of the postwar U.S. Submarine force and supplied numerous allied navies. The shared design created a common starting point, while individual ships could accumulate different deployments, combat damage, modernization work, transfers, and end states.

Historical significance

Balao combined mass production, Pacific endurance, and improved diving depth in the mature U.S. Wartime fleet-submarine design. Its significance is best assessed through the relationship between mission, technical choices, production scale, and the service experience of its members.

For Balao class, the most useful points of comparison are the requirement for attack-submarine operations, interdiction of maritime trade, and long-range patrol, the use of diesel electric, fleet submarine, and increased test depth, and a program recorded as 182 planned, 182 ordered, 122 laid down, 120 completed, and 62 cancelled. Those factors help explain what the class offered United States Navy, how it differed from predecessors or contemporaries, and why ships built to the same design could still have different careers.

Understanding Balao class across time requires separating the design as approved, the configuration in which individual ships entered service, and later changes made after operational experience. For United States Navy, that distinction matters because a refit could alter weapons, sensors, aviation facilities, command arrangements, or mission without creating a new class. The class history defines the common baseline; dated ship histories show how each member changed within it.

Ships in this class

Showing 122 recorded class members.

Sources and further reading

H-033-2: Red Ramage ↗Naval History and Heritage Command · accessed 2026-09-18
Balao class submarines ↗uboat.net · accessed 2026-09-18

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