The Swedish Navy's HSwMS Gotland is set to be relaunched following a series of mid-life upgrades to the submarine.
Mid-life upgrades and refurbishments were performed on the vessel by Kockums Naval Solutions, a subsidiary of the Saab Group.
Upgrades included integrating a Stirling Engine, modern sensors and new management functions.
The relaunch ceremony will take place in Karlskrona on June 20.