Submarine "Humaitá" performs static immersion test in Itaguaí-RJ

Test is foreseen before the ship is handed over to the operational sector

By Agência Marinha de Notícias – Brasília, DF

This Friday (04), the “Humaitá” submarine conducted a static immersion test, a decisive procedure for the evaluation of its stability at sea.

The second of the four diesel-electric submarines of the Submarine Program (PROSUB) was evaluated in a sea area near the Itaguaí Naval Complex, in the Sepetiba Bay, southern coast of the state of Rio de Janeiro, and obtained another satisfactory result in the series of evaluations for the delivery of another submarine to the operational sector of the Brazilian Navy (MB), scheduled for the second half of 2023.

Static immersion consists of the controlled admission of water into the submarine’s ballast tanks until it is completely immersed, without using its propulsion. With the submarine immersed, using movements of weights positioned along the vessel, the response of the platform in terms of increasing inclination angles is verified, thus obtaining the transverse and longitudinal stability parameters.

In the testing, the volume of water that was admitted to the internal surge and trim tanks is also verified, essential to accurately determine their displacement in the immersion condition and confirm the theoretical values calculated during the design phase.

In addition, the operation tests of the rescue guardhouse and exercise pyrotechnic launching were performed. Both tests are intended to verify the efficiency of systems directly related to the existing rescue features of this class of submarine, being essential requirements for the safe conduct of the sea acceptance test phase.

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