HSwMS Belos (A214) is a submarine rescue ship within the Swedish Navy’s 1st Submarine flotilla. She can also be able to carrying the NATO Submarine Rescue System (NSRS). [1] Belos is traditionally the title of the Swedish Navy’s submarine rescue vessel and she is the third ship with that identify. As of 2017[update] HSwMS Belos was the most important ship by displacement in the Swedish Navy. She carries the submarine rescue car (SRV) URF.

Description
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Originally built as a diving help vessel, Belos was launched in 1985 at the Dutch shipyard De Hoop[2] operated within the worldwide offshore business named Energy Supporter. In 1992, she was purchased for the Royal Swedish Navy, renamed to Belos, and has since been redesigned into a complicated diving and submarine rescue ship. Belos, with the submarine rescue vessel URF was the primary submarine rescue system that would perform switch under stress (TUP) from a disabled submarine, via the rescue vessel to a decompression chamber system for therapy to keep away from decompression sickness.

Usually, the ship does not anchor however hovers on the distressed submarine utilizing her azimuth- and bow thrusters, and a dynamic positioning (DP) system. Onboard Belos, an extensive array of remotely operated underwater vehicles (ROVs), oceanographic tools, craneage, diving-, medical-, and decompression amenities are accessible. Completely different sonar systems connected to the hull and towed astern of the Belos can be used for looking out distressed submarines or different objects at the seabed. The Belos along with the SRV URF compose the backbone of the Swedish Submarine Escape and Rescue System.

Belos can perform diving and underwater tasks using a wet bell and ROVs. The power to carry out varied types of underwater work is crucial for submarine rescue operations. The divers are outfitted with sizzling-water suits, Tv cameras, and constant communication with the diving supervisor on board the Belos. The wet-bell is used for air-diving with two divers at a time to a maximum depth of 60 metres (200 ft). A slide leads from the divers’ exit level to the chamber to speed up the floor decompression course of. If the mating area to which the rescue vessel is to connect with the distressed submarine is covered by debris, fishing nets or other obstacles, these obstacles should be removed earlier than mating the rescue vessel to the submarine. For smaller submarines or crewed submersibles, the rescue operation may be reducing free the vessel itself whether it is snagged by e.g. nets or cables and unable to floor (see AS-28).

The underwater autos are all equipped with positioning techniques, Television cameras, and sonar techniques, allowing them to operate in situations of poor visibility. The utmost diving depth is 1,000 metres (3,300 ft) and underwater work is performed by using hydraulic manipulators with a range of interchangeable instruments.

The Belos has a big craneage capability. For lifting, craneage with a capacity of 5, 6, 10 or 100 tons is out there. As well as, an A-body in the stern with a capacity of fifty five tons is used for dealing with the submarine rescue vessel URF.

Refits
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Initially, the 100-ton crane was used for launching and recovering URF, a technique quite unreliable throughout rough weather, resulting in the development and set up of a 55 ton A-body aft. This cooperation is now replaced with the NATO Submarine Rescue System which is absolutely operational from Belos. The decompression chamber system was improved leading to a decompression capacity of forty folks at a time, together with rescuees, medical personnel, and chamber attendants. The system consists of three cylinders divided into four predominant chambers. In November 2017 the Royal Netherlands Navy joined the co-operation. In co-operation with the UK Royal Navy resulted in the UK submarine rescue vessel LR5 being fully operational from HSwMS Belos including TUP capacity.

The ship saw the installation of TUP connection system that may be maximally pressurised to the equal of 50 metre sea water (msw) with direct access to the chamber system. The ship also noticed enhancements of the DP system.

Throughout the 2024 Estlink 2 incident Finland requested Swedens assistance in searching the seabed in the Gulf of Finland for hints concerning the possible sabotage of underwater cables. Sweden introduced the deployment of Belos on 3 January 2025,[3] the crew managed to find the lacking anchor of the suspected vessel Eagle S on 7 January.[4]

^ a b c d e f g Swedish Armed Forces (in Swedish)

^ Shipyard De Hoop – NB314 (in English)

^ “Authorities get well Eagle S anchor from Gulf of Finland”. yle.fi (in Finnish). 2025-01-03. Retrieved 2025-01-07.

^ “Authorities recover Eagle S anchor from Gulf of Finland”. yle.fi. 2025-01-07. Retrieved 2025-01-07.

1st Submarine flotilla – Ubåtsräddningsfartyg (in Swedish)

Swedish Armed Forces – Ubåtsräddnignsfartyg (in Swedish)

Örlogsboken 2003 (in Swedish)

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This page was final edited on 1 May 2026, at 23:Forty nine (UTC).

HSwMS Belos (A214)