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The Tupi Submarine Was Decommissioned at the Naval Armory of Rio de Janeiro (AMRJ) After Strategic Maintenance. Ship Remains Moored for Tests Until July 2025.
The Tupi Submarine, an important asset of the Brazilian Navy, was officially decommissioned at the Naval Armory of Rio de Janeiro (AMRJ) following a series of technical interventions carried out during its second Routine Docking Period (PDR). With the completion of this phase, the vessel moves on to a new testing phase, which will take place at the Naval Base of Ilha das Cobras, ending in July 2025.
Focus on Modernization and Operational Efficiency
The actions conducted at AMRJ included everything from structural inspections to repairs and replacements of vital systems.
Among the highlights was the replacement of some battery components and the execution of maintenance known as W5 and W6 on the main combustion engines.
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Russia is building the world’s most powerful nuclear icebreaker with 150 MW and 2 reactors while the US has not delivered a new heavy one since 1999.
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Styrofoam block cut with hot wire turned into a real boat with three layers of fiberglass and polyester resin, floats without rotting or rusting, carries up to five people, and uses a professional shipyard sandwich technique for less than R$ 500 per square meter.
The recovery of the insulation resistance of the main electric motor was also carried out — essential for the safety and performance of the submersible vessel.
The hull of the Tupi Submarine underwent repairs both in the pressure-resistant and non-resistant sections. Components such as hull valves, high-pressure air compressors, and torpedo tubes were also reviewed or replaced.
The vessel also received complete treatment and painting, within the technical schedule provided.
Tests at Dique Santa Cruz Ensure Operation Safety
After the completion of maintenance, all systems underwent rigorous testing at Dique Santa Cruz, located at the Naval Armory of Rio de Janeiro.
The results validated the operational integrity of the submarine, authorizing its decommissioning and the start of the new phase of dock trials, which occur with the ship moored at the Naval Base of Ilha das Cobras.
Tupi Submarine: A Vessel with Legacy and Tradition
The Tupi Submarine (S-30) is the second submarine in the Navy to bear the name in honor of the Tupi indigenous nation. Its construction was commissioned in 1984 to the German shipyard Howaldtswerke Deutsche Werft (HDW) in Kiel.
The keel was laid in March 1985 and the launching took place two years later, in April 1987. The baptism ceremony was sponsored by Mrs. Heloísa Fonseca, wife of the then Minister of the Navy, Admiral Maximiano Eduardo da Silva Fonseca.
After being delivered by HDW in December 1988, the Tupi conducted sea trials and crew training in the Baltic Sea.
The official incorporation into the Brazilian Navy took place on May 6, 1989, in Germany, marking its entry into operation as a warship.
AMRJ Reinforces Strategic Role of Brazilian Military Naval Industry
The revitalization of the Tupi Submarine at the Naval Armory of Rio de Janeiro (AMRJ) highlights the technical and strategic capacity of the national military naval industry.
By conducting complex maintenance and modernization services, AMRJ directly contributes to preserving the deterrent power of the Navy and sovereignty in Brazilian waters.
With the advancement of the schedule, the Tupi Submarine reaffirms its role as a key component in the country’s maritime defense, uniting tradition, technology, and readiness for future challenges.
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