The dive took place in the waters of the La Algameca naval station, opposite the Navy's Diving Centre. It forms part of the safety milestones in the construction and testing of the S-80 submarine program and is carried out after surface navigation and prior to the dive.

The immersion has been carried out in different phases in order to measure the drafts in the Navantia armament dock before going out to the open sea. The submarine carried out its dive in a location close to the 50-meter buoy located in front of the Navy's Diving Centre in La Algameca. Tests on the S-81 submarine will continue until its delivery to the Navy.

"With its first static dive, the S-81 has passed a milestone on its way to full operation. The close collaboration between Navantia, the Navy, and the Ministry of Defence is making it possible to make steady progress in the greatest challenge ever faced by the Spanish industry. The first dive we have witnessed today is the result of the efforts of many professionals, so I would like to thank all the people involved in the program for their dedication and commitment to ensure its success and congratulate them on this important step", said the President of Navantia, Ricardo Domínguez.