7 Active naval ships of Sweden

HSwMS Belos (A214) is a submarine rescue ship in the Swedish Navy's 1st Submarine flotilla. She carries the Submarine Rescue Vehicle URF. She is also capable of carrying the NATO rescue system NSRS. HSwMS Belos is currently [2017] the largest ship in the Swedish Navy. HMS Belos is traditionally the name of the Swedish navy's submarine rescue vessel and she is the third ship with that name.

HSwMS Carlskrona is the longest vessel in the Swedish Navy at 105.7 metres (347 ft). Only Belos, the submarine rescue vessel, has more displacement. She was originally designed as a minelayer and is also used for exercise expeditions. She replaced HSwMS Älvsnabben in both roles.

The Gotland-class submarines of the Swedish Navy are modern diesel-electric submarines, which were designed and built by the Kockums shipyard in Sweden. They are the first submarines in the world to feature a Stirling engine air-independent propulsion (AIP) system, which extends their underwater endurance from a few days to weeks. This capability had previously only been available with nuclear-powered submarines.

HSwMS Orion (A201) is a signals intelligence gathering vessel of the Swedish Navy.

The Swedish Södermanland class of diesel-electric submarines consists of HSwMS Södermanland and HSwMS Östergötland. These two submarines were originally launched as Västergötland-class submarines in 1987 and 1990, and have been relaunched as a new class after extensive modernization in 2003 and 2004 by Kockums AB. The pressure hull had been cut in two after the sail and a 12 m long new section with an air-independent propulsion system was inserted. It contains two Stirling engines which are coupled to electric generators and heated by burning diesel fuel with liquid oxygen stored in cryogenic tanks. The AIP system can provide electric energy to extend the submarine's submerged time from days to weeks.

HSwMS Trossö (A264) is an auxiliary ship in the Swedish Navy. She was built in Finland for the Soviet Navy as an Akademik Shuleykin-class ice-strengthened patrol craft tender, launched in 1984 as Arnold Veymer and renamed Livonia in 1991. Her sister ships were Akademik Shuleykin, Akademik Gamburtsev, Professor Molchanov, Professor Multanovskiy, Geolog Dmitriy Nalivkin, Professor Polshkov, Professor Khromov and Akademik Shokalskiy.

The Västergötland class of diesel-electric submarines was introduced in 1987 by the Swedish Navy.