The Spanish Ministry of Defence announced the exercise’s completion in a statement dated 4 October 2026. It said the operation demonstrated the first S-80-series submarine’s integration with the fleet and readiness to support Spain’s defence commitments.
The exercise placed S-81 in a coordinated naval operation using live weapons under conditions intended to resemble combat. The ministry said the engagement demonstrated its ability to operate stealthily and strike with precision.
It described the submarine’s wider deterrent value as the uncertainty its concealed presence creates for a potential adversary. The ministry also highlighted S-81 as evidence of Spanish industry’s ability to design and build advanced submarines.
Isaac Peral participated alongside the frigates Cristóbal Colón (F-105) and Navarra (F-85), the multipurpose vessel Carnota (A-61) and the offshore patrol vessel Relámpago (P-43). The exercise also involved the Mine Countermeasures Diving Unit, three AV-8B Harriers, a helicopter, a ScanEagle unmanned aircraft and a Spanish Air Force maritime patrol aircraft.
Captain Rafael Mira Calvo, commander of the 41st Escort Squadron, directed the activity at sea from Navarra with his staff. He said “the exercise could not have been conducted without the professionalism, training, and effective coordination of the crews, pilots, specialized teams, and support elements of the participating units; their performance was essential to executing the activities in accordance with established procedures and safety measures.”
Before the exercise, Infanta Elena underwent decontamination, including the removal of fuels, oils and potentially polluting components. The navy also assessed the area’s hydrographic and environmental conditions and implemented monitoring procedures to protect marine wildlife and civilian navigation.
