This Friday (04), the Submarine “Humaitá” carried out the 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) carried out the assessment in a maritime area close to the Itaguaí Naval Complex, in Sepetiba Bay, south 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 complete immersion, without using its propulsion. With the submarine submerged, using movements of weights positioned along the vessel, the response of the platform in terms of increasing angles of inclination is verified, thus obtaining the parameters of transverse and longitudinal stability. 

In testing, the volume of water that was admitted to the internal compensation and trimming tanks is also verified, essential to accurately determine its displacement in the immersion condition and confirm the theoretical values ​​calculated during the design phase. In addition, tests were carried out on the operation of the rescue guardhouse and launch of exercise pyrotechnics. Both tests are intended to verify the efficiency of systems directly related to the rescue resources existing in this class of submarines, being essential requirements for the safe conduct of the phase of acceptance tests at sea.