Tag Archives: Isaac Peral (S-81)

Sea Trials

According to Infodefensa, the submarine S-81 Isaac Peral will carry out the first surface navigation in the open sea at the end of May. The Ministry of Defense has confirmed that this milestone will take place within a month, during a visit, the fifth in just over a year, by Minister Margarita Robles to the Cartagena Arsenal and the nearby Navantia facilities to learn about the status of the program S-80 and more specifically the advances in the tests of the S-81.

Isaac Peral (S-81)
The first navigation of the S-81 Isaac Peral of the Navy will be at the end of May

At the Navantia shipyards, the Minister of Defense has been able to find out in detail the current status of the S-80 program, four state-of-the-art submarines that will be delivered to the Navy in the coming years. The president of the shipbuilding company, Ricardo Domínguez, has conveyed calm to the minister, assuring that «everything is developing as it should be, we are on the right track. You have to walk with a firm step to navigate safely».

Robles has also been informed of the details of the ship’s first surface navigation, which will take place once the safety tests have been passed. Subsequently, the first static immersion and first navigation in immersion will be carried out, before delivery to the Navy.

The minister stressed that this program «is very important for the Navy, for Cartagena and for Spain» and pointed out that «we must go little by little and follow the steps. We absolutely trust their professionalism».

The start of the sea trials was initially scheduled for the last week of March, in accordance with the deadlines handled by Defense, but it has been postponed due to technical issues. Despite this apparent delay in the program, both the manufacturer and the Ministry of Defense maintain for a year from now, in April 2023, the date of entry into service in the Navy of the first submarine of the S-80 series.

Three other submersibles named after pioneers of underwater navigation (the S-82 Narciso Monturiol, the S-83 Cosme García and the S-84 Mateo García de los Reyes) will be delivered to the Navy between 2024 and 2028. The two the latter will already have the Anaerobic Propulsion System (AIP) as standard, which allows them to generate electrical energy and navigate for weeks without going to the surface, providing tactical and discretionary capabilities that do not exist at the current date.

With the S-80 program, Spain enters the group of ten countries with the capacity to build conventional (non-nuclear) submarines, highlights the ministry. Robles has been accompanied by the Secretary of State for Defense, Esperanza Casteleiro; the Chief of the Navy General Staff, Admiral General Antonio Martorell; the General Director of Armament and Material, Admiral Aniceto Rosique, and the Admiral of Maritime Action, Juan Luis Sobrino, among others.

S-80 class submarine

His Majesty King Felipe VI, accompanied by Her Majesty the Queen, Her Royal Highness the Princess of Asturias and Her Royal Highness Infanta Sofia has presided over the launching ceremony of S-81, the first submarine of S-80 class, in Navantia shipyard in Cartagena (Murcia, Spain).

Isaac Peral (S-81)
His Majesty King Felipe VI presides the launching ceremony of the first S-80 submarine

Her Royal Highness the Princess of Asturias sponsored the submarine. As the maritime tradition demands, Her Royal Highness has cut the ribbon that activates the mechanism and smashes the bottle. Prior to the ceremony, Their Majesties and Their Royal Highnesses have visited the Engineering unit of the shipyard and its Virtual Design Centre (CDV).

With S-80 program, Spain becomes one of the few countries that can design and build submarines, an extremely complex task because these vessels must operate autonomously in a hostile environment. Therefore, represents a strong commitment with national technological development, and thus, with national defence as well as with the international positioning of Spanish industrial sector.

The launching ceremony has been attended by the Minister of Defence, Margarita Robles; the President of Región de Murcia, Fernando López Miras; the Chief of the General Staff (JEMAD), Almirante General Teodoro López Calderón and the Admiral Chief of Staff of the Navy (AJEMA), Almirante General Antonio Martorell Lacave, as well as the President of Navantia, Ricardo Domínguez and the President of the Spanish State-owned holding (SEPI), Belén Gualda, among other authorities.

The S-80 programme is the greatest industrial and technological challenge ever faced by the national defence industry. Navantia is taking a huge technological step forward, as it is taking the role of Technical Design Authority for the first time. In addition, Navantia is completing the cycle of technological evolution: from building in Spain with a foreign design to building in Spain with Spanish design.

The ceremony, which has been held under health and safety precautions due to the current health situation, has taken place days ahead of the process of setting the submarine afloat. This process, which takes long hours, will be carried out by shipyard staff as a routine of work in the following week.

The next phases will be harbour tests and sea tests, which include sailing up to the maximum operating depth. The first sailing is scheduled for early 2022 and delivery to the Navy in early 2023.

Navantia’s President has expressed his gratitude to the Ministry of Defence and the Navy for their «committed and unwavering support they have given to the programme, in view of its strategic importance for Spain». He has also commended the workers of the company and the collaborating industry as a great example of Spain technological capabilities.

Ricardo Domínguez has underlined that the S-80 class «gives a major boost to Spanish industry and puts Navantia firmly in the forefront giving the firm a major international profile with many opportunities in other countries». Navantia expects to repeat the successes obtained with the F-100s and the ‘LHD’ amphibious assault ships.

The Admiral Chief of Staff of the Navy has underlined that «the submarine is proof of Spanish industrial capacity and its firm commitment to technological innovation». He has added that «the S-80 provides the Navy, along with the projection capacity represented by the amphibious ships, marine infantry and embarked aviation, the escorts and the maritime action force, the means that makes it relevant in the international context».

Finally, the Minister of Defence has defined today as a historic day for Spain. She has said that the submarine means «science, innovation, technology, it is the future» and has recognized the work and effort of all those who have made possible the S-81, which she has described as a «masterpiece».

The S-80 submarines have an overall length of 80.8 metres/265 feet, a diameter of 7.3 metres/24 feet, and a submerged displacement of around 3,000 tonnes. They include the integrated combat system and platform control system developed by Navantia Sistemas. They will have BEST-AIP, an atmosphere-independent propulsion system, which supplies the ship with electrical power at any depth so that it can remain underwater for longer periods.

Therefore, S-80 has improved considerably its stealth capabilities, the main attribute of a submarine. The S-80 stands as the world’s most advanced conventional submarines and has drawn the attention of several navies and opened opportunities in a highly technological international market.

S-80 Plus
Isaac Peral (S-81) is one of the largest non-nuclear submarines in the world

Isaac Peral

Navantia has finalized, in the Cartagena facilities, the closure of the resistant hull of the S-81 «Isaac Peral» submarine for the Spanish Navy, after the union of the last section of the ship.

Navantia closes the resistant hull of S81 «Isaac Peral» submarine

The event has been attended by the General Director of Programs from the Ministry of Defence (MoD), General Salvador Álvarez Pascual; the Chief of the Cartagena Arsenal, Vice Admiral Aniceto Rosique Nieto; the Director of Engineering and Construction, Vice Admiral Manuel Martínez Ruiz; the Chief of the Logistics Division, Admiral Gonzalo Sanz Alisedo; the Head of the Naval Systems Department of the Directorate General of Armaments and Material (DGAM), Nicolás Lapique Martín, and the Head of the S-80 Program, Javier del Corral. On behalf of NAVANTIA, the Director of Operations and Business, Gonzalo Mateo Guerrero-Alcázar; the Director of the Shipyard and S-80 submarines Program, Agustín Álvarez Blanco; the Director of Navantia Sistemas, Vicente Santamaría Calvario, and the head of the S-80 Program Office, Ignacio Núñez.

The event began with a brief tour of the submarine, where the progress of the construction of both the S-81 and S-82 submarines was shown. Next, a brief presentation of the submarine’s construction process was made, after which the Director of the Shipyard of Cartagena and the General Director of Programs from the MoD have given a speech, highlighting the importance of this event and the S-80 submarines program.

The closure of the resistant hull is a crucial milestone in the construction of a submarine, as it appears as a complete vessel. Previously, the loading of all the main modules has been carried out, as well as a very high level of completion of the sections. The next step is the completion of the fitting works and the beginning of the testing stage.

This step represents a change of phase. The work in the submarine is now focused on its launching, following a formal and regulated process, based on overcoming safety milestones. This process begins with the tensioning, when the submarine begins to receive electric current; then the battery boarding, to gain autonomy in power generation, and finally the floating and the sea trials.

The scheduled date for floating is October 2020.



Length 80.81 m/265.1 feet
Total Sleeve 11.68 m/38.3 feet
Total Strut 13.69 m/44.9 feet
Diameter 7.30 m/23.9 feet
Surface displacement/immersion 2,695/2,965 t
Accommodation 32 provision + 8 special forces
Conventional submarine of high autonomy equipped with anaerobic propulsion
Extremely low acoustic signature
Excellent maneuverability at low speed
Systems with high automation
Next generation combat system
Air Independent Propulsion system (AIP) – State of the art
High complexity integrated design