Lada-class submarine

The Lada-class submarine is Russia's Project 677 diesel-electric attack submarine family, designed by Rubin and built by Admiralty Shipyards for coastal, confined-water, and strait operations. The class emphasizes reduced noise, torpedo and missile armament, and an optional air-independent propulsion fit.

Various Conflicts🏳️ Unspecified

Lada-class submarine, Diesel-electric attack submarine, Naval Systems

Image source: International Maritime Defence Show 2011 (375-27).jpg

Profile

Origin: Russia
Built by: Admiralty Shipyards
Type: Diesel-electric attack submarine
Service note: 1997-present
Designer: Rubin Central Design Bureau for Marine Engineering
Designed: 1990s
Produced: 1997-present
Number built: At least 3 commissioned, with additional boats under construction

Also Known As

Lada
Lada class submarine
Project 677
Project 677 Lada
Project 677 submarine
Sankt-Peterburg-class submarine

submarine anti-submarine warfare cruise missile torpedo stealth

Specifications

Displacement: 1,765 tonnes surfaced; 2,650 tonnes submerged
Length: 66.8 m
Speed: 10 knots surfaced; 21 knots submerged
Operational depth: 300 m
Crew: 35
Armament: Six 533 mm torpedo tubes with torpedoes, missiles, and sea mines

Service And Conflict Use

Service History

In service: The prototype entered trial service in 2010, and Kronstadt was commissioned into the Russian Navy in 2024 and assigned to the Northern Fleet.
Used by: Russian Navy

Conflict Usage

Side: 🏳️Unspecified

Open-source reporting confirms the Project 677/Lada class is actively fielded by the Russian Navy, including Kronstadt's commissioning and assignment to the Northern Fleet, but the available sources do not tie this page to a specific named conflict, so it remains in Various Conflicts.

Timeline

Lada-class submarine Key Events

Sep 20, 2018
Kronstadt is launched
Open reporting covered the launch of the second Project 677 boat after a long construction pause and redesign work.
Sources: Russia commissions second Lada-class submarine
Jan 31, 2024
Kronstadt is commissioned
Janes and Naval News reported that the Russian Navy formally commissioned Kronstadt at Admiralty Shipyards in St Petersburg, confirming the class's return to active fielding.
Sources: Russia commissions second Lada-class submarine, Russia Commissions First Serial Lada-class Submarine

Lada-class submarine Images

Lada-class submarine, Diesel-electric attack submarine, Naval Systems - view 1 — Source: B-587 in 2024.jpg

Lada-class submarine, Diesel-electric attack submarine, Naval Systems - view 2 — Source: Lada class S.Peterburg.svg

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Sources

Diesel-electric submarine of project 677Publisher: Admiralty Shipyards | Note: Supports Project 677/Lada background, Rubin designer context, Admiralty Shipyards product-line context, coastal and confined-water mission set, torpedo and missile armament, reduced-noise design, and optional AIP fit. | Accessed: 2026-06-25 Russia commissions second Lada-class submarinePublisher: Janes | Note: Supports Various Conflicts fielded-by context: Janes reported the Russian Navy formally commissioned Kronstadt, confirming the Project 677 class is actively fielded, but it does not tie the submarine to a specific named conflict. | Accessed: 2026-06-25 Russia Commissions First Serial Lada-class SubmarinePublisher: Naval News | Note: Supports Project 677 service history and core specifications, including displacement, length, speed, crew, depth, and armament. | Accessed: 2026-06-25 International Maritime Defence Show 2011 (375-27).jpgPublisher: Wikimedia Commons | Note: Supports image provenance and licensing context for the hero image of the Lada-class submarine prototype at the 2011 International Maritime Defence Show. | Accessed: 2026-06-25 B-587 in 2024.jpgPublisher: Wikimedia Commons | Note: Supports image provenance and licensing context for a 2024 Lada-class submarine gallery image. | Accessed: 2026-06-25 Lada class S.Peterburg.svgPublisher: Wikimedia Commons | Note: Supports image provenance and licensing context for the Lada-class schematic gallery image. | Accessed: 2026-06-25