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Submarine

Sweden

Saab AB

Gotland-class

A Swedish diesel-electric attack submarine class notable as the world's first to enter service with Stirling-engine air-independent propulsion, allowing extended submerged endurance without snorkeling. One boat was leased to the US Navy for years of anti-submarine warfare training against its exceptionally quiet signature.

In service since 1996 · 1 operator countries

Compiled from public sources ·primary reference ↗ ·last verified 2026-07-02

200

m depth

6,000

nmi

1,600

crew

Procurement snapshot

Availability & export

Swedish export-licensed

ISP licensing; EU/Wassenaar controls.

Channel: Direct commercial / G2G

Fielded & proven

Limited · 1 operator

In service since 1996. Status: active · ~3 built.

Lifecycle cost (est.)

No public unit price to model from.

Interoperability

No standardised NATO calibre / datalink detected in public specs.

Derived guidance from public data, export regime by country of origin, lifecycle from the GAO ~30% acquisition rule. Verify eligibility, pricing and offsets with the manufacturer and your acquisition authority.

Compatible munitions & weapons

Publicly reported weapons the Gotland-class can carry. Linked items have a full spec page.

Tp 613 heavyweight torpedo Tp 43 torpedo naval mines

Full specifications

Firepower

Armament, payload and guidance.

Torpedo tubes Number of torpedo tubes (submarines and some surface ships).: 4

Stronger than 13% of submarines

Physical

Dimensions, weight and crew.

Length Overall length including gun/probe where applicable.: 60.4 m

Naval

Displacement, speed, endurance and diving depth.

Displacement Standard displacement in tonnes, the ship’s size class. Larger hulls carry more but cost more and are less agile.: 1,600 t
Submerged speed Maximum speed while submerged (submarines). Higher is faster underwater.: 20 kn

Stronger than 26% of submarines
Range Cruising range in nautical miles. Nuclear vessels are effectively unlimited (fuel-wise). Higher means more reach without replenishment.: 6,000 nmi

Bottom 6% of submarines
Test depth Maximum rated diving depth (submarines). Deeper is harder to detect and engage. Actual crush depth is classified.: 200 m

Bottom 5% of submarines
Complement Crew size. Fewer eases manning cost; more may indicate a larger, more capable platform.: 25
Propulsion plant Machinery type, nuclear reactor, gas turbine (COGAG), CODAG, diesel-electric, AIP.: Diesel-electric with Stirling air-independent propulsion

Program

Cost, production scale and operators.

Units built Total production run. Higher means proven manufacturing, mature logistics and spares availability.: 3

Stronger than 25% of submarines
Operator countries Number of countries operating the system. More operators means broader support ecosystem.: 1

Stronger than 39% of submarines

Specifications compiled from public Saab AB and reference sources ↗. Published defense figures are approximations, treat comparisons as directional. Last verified 2026-07-02.

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