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SAES and Satlink unveil Ocean Sentinel: cutting-edge technology for underwater surveillance and protection

SAES and Satlink unveil Ocean Sentinel: cutting-edge technology for underwater surveillance and protection

Publicado: 13/05/2025

The technology company SAES, in collaboration with Satlink, has launched Ocean Sentinel, an innovative underwater surveillance system, during the ‘SAES Day’ at the national defence exhibition, Feindef, held in Madrid from 12th to 14th May. This unique system is specifically designed to enhance Maritime Safety and Defence, offering an advanced, cost-effective approach to threat detection in the naval environment.

Ocean Sentinel marks a significant advancement in surveillance systems by incorporating state-of-the-art acoustic technology. Designed to operate autonomously, the system consists of smart buoys deployed at sea, supported by a remote-control centre that receives and analyses early alerts. Each buoy is equipped with hydrophones, devices functioning like underwater microphones capable of capturing sounds in the marine environment. Additionally, it employs edge computing, a data processing methodology that takes place near the data source. This approach eliminates dependence on a centralised location and enables faster response times. With this technology, the system can be configured remotely to adjust its detection capabilities according to the specific underwater threats being monitored. The system delivers a high level of operational efficiency without significant associated costs.

Ocean Sentinel is set to be operated during NATO exercises REPMUS 2025 in Portugal, where SAES will work closely with its main client, the Navy. This collaboration has not only allowed the definition of use cases for the defence sector but will also provide operational validation of the system in real-world scenarios. According to Javier Mármol, President of SAES, “With Ocean Sentinel, we are offering the Civil Guard effective solutions for civilian protection, such as early identification of small boats from a great distance offshore, preventing loss of life, and the ability to monitor the presence of drug-trafficking boats.” Faustino Velasco, President of Satlink, added, “This technology represents a milestone in underwater surveillance. Thanks to its intelligent design and operational autonomy, Ocean Sentinel offers effective solutions not only for defence but also opens up new possibilities for protecting critical infrastructure and supporting civilian missions with maximum efficiency and reliability.”

Furthermore, Ocean Sentinel integrates seamlessly with SAES’s Diver Detection Sonar (DDS), providing an additional layer of security for critical infrastructure such as ports. Although Ocean Sentinel is technologically advanced in its development, its design allows for easy use, enabling clients to monitor early alerts without requiring specialised knowledge in acoustics. This feature highlights the user-friendliness and adaptability of Ocean Sentinel, setting a new standard in maritime security.

Video del Ocean Sentinel

Participación en consorcios de ámbito nacional e internacional_

SAES has participated in the development of the MIRICLE project (December 2021 to December 2023), selected for funding by the European Commission in the 2020 EDIDP (European Defence Industrial Development Program) call, under the theme: Solutions to detect, identify, counter, and protect against the threat of mines, including those operating at great depths.

The project has been developed by a consortium composed of 18 entities from 10 European nations and coordinated by the French entity Naval Group.

MIRICLE (Mine Risk Clearance for Europe) addresses the main components of an innovative mine countermeasure solution, such as: mission system, communication network, MCM (Mine Countermeasure) vessel, and robots, using Artificial Intelligence to support decision-making and leading to significant improvements in the execution of MCM missions. More specifically, it will enable European navies to benefit from the highest and most interoperable military mine countermeasure capabilities, in accordance with NATO recommendations.

SAES’s participation in the project focuses on two areas: reduction of electric and magnetic signatures, including the definition, design, development, and testing of an electromagnetic signature reduction system, and the study, analysis, and evaluation of the mine threat.

SAES is part of the consortium of European entities developing the USSPS (Unmanned Semi-fixed Sea Platforms) project, selected by the European Commission in the 2019 call under the theme: Maritime surveillance generated by sensor networks based on fixed or semi-fixed unmanned platforms.

The selected consortium is composed of a total of 17 entities from 7 European countries and is coordinated by the Greek entity ETME. SAES participates as a Linked Third Party of Navantia. The project has a duration of 42 months, with its completion scheduled for May 2025.

The project is focused on the development of a prototype unmanned platform, highly autonomous, energy-efficient, based on miniaturised oil platform technologies and equipped with a wide range of aerial, surface, and underwater sensors. This platform can be deployed in any geographical area, including deep waters, and in adverse environmental conditions, making it very versatile in its operations.

SAES’s participation focuses on integrating its DDS-03 Diver Detection Sonar and its associated DES system into the platform, aimed at deterring divers from approaching the protected area by emitting acoustic messages. It also participates in the development of requirements and the design of the complete system prototype.

Since December 2022, SAES has been participating in the dTHOR project, selected in the 2021 call of the European Defence Fund (EDF) under the category: Smart Ships, theme: Structural Health Monitoring of Digital Ships.

The project has a duration of 36 months and is being developed by a consortium of 35 entities from 9 European countries, coordinated by the Norwegian entity SINTEF.

dTHOR (digital ship sTructural Health mOnitoRing) will develop the next generation of a predictive structural health monitoring system for ships. This system is based on the innovative use of: large amounts of load and response measurements obtained from robust and advanced sensors, a digital environment compatible with recognised open standards for data exchange, and hybrid analysis and modelling, which combines physical and data-driven models.

SAES’s participation in dTHOR focuses on the areas of modelling, including the development of the ship’s vibration-noise transfer function, selection of sensors for acoustic signature acquisition, and management of underwater radiated noise.

SAES is part of the consortium of entities developing the EPC (European Patrol Corvette) project, selected in the 2021 call of the European Defence Fund, in the category: Offshore patrol vessel, theme: Modular and multirole patrol corvette.

The EPC began in November 2023, has a duration of 24 months, and is being developed by a consortium of 35 entities (including beneficiaries, affiliated entities, and subcontracted entities) from 12 European countries, coordinated by the Franco-Italian entity NAVIRIS.

The EPC project is focused on the development of conceptual studies, up to the initial design, of a reference corvette-class ship, capable of carrying out a wide range of missions in future operational contexts. The design produced will lead to the development of a modular and flexible ship, more energy-efficient, more environmentally friendly and safe, and more interoperable and cyber-secure compared to current configurations.

SAES’s participation in EPC is focused on the active management of the ship’s multi-influence signatures, including:

– Measurement and analysis of the ship’s underwater signature.

– Prediction and control of acoustic, electric, and magnetic signatures.

– Acoustic noise monitoring system.

– Digital twin for acoustic signature management and control.

– Tool for evaluating the corvette’s detectability against naval mines.

SAES is part of the international consortium developing the SWAT-SHOAL project (Swarm and teaming operation of Manned & Unmanned Underwater Vehicle SHOAL), selected in the 2023 EDF call under the theme: Underwater manned-unmanned teaming and swarms.

SWAT-SHOAL began in December 2023, has a duration of 36 months, and is being developed by a consortium of 20 entities from 12 European countries, coordinated by the Spanish entity NAVANTIA.

The SWAT-SHOAL project develops the concept of a system of systems that integrates different types of manned and unmanned vehicles into a swarm to achieve greater effectiveness in underwater missions, such as: surveillance, reconnaissance, mine warfare, collaborative engagements, or support for amphibious operations.

SAES’s participation focuses on leading work package WP5, which is focused on identifying technological gaps and defining future roadmaps to eliminate these gaps, and on participating in work packages centred on: scenario definition and requirements capture, System of Systems requirements, platforms and components, communication technology, and work packages related to demonstration simulation and the preparation and execution of the sea demonstration.

SAES is part of the international European consortium developing the UnderSec (Underwater Security) project, selected in the 2022 Horizon Europe call under the theme: Underwater Detection and Control Capabilities.

The consortium responsible for the development of the project is composed of a total of 22 entities from 7 European countries and is coordinated by the German entity Fraunhofer. The project has a duration of 36 months, with its completion scheduled for October 2026.

Within the scope of the project, a prototype system with a modular approach will be developed, consisting of systems, sensors, and robotic assets for the surveillance of ships, ports, and maritime infrastructures, including demonstrations in real operational environments.

SAES leads the work package WP3 Protection Technologies for continuous underwater surveillance and detection of potential threats for early warning and deterrence actions, for which it will develop a barrier of magnetic sensors to detect possible intruders and will provide its DDS-03 diver detection sonar and its DES diver access deterrence system. Additionally, it will participate in other work packages related to activities such as the definition of operational concepts, system integration, and prototype testing.

Since November 2022, SAES has been participating in the development of the European project SONORA, selected under the 2022 call of the JPI (Joint Programming Initiative) Oceans: Underwater Noise in the Marine Environment.

SAES participates as a subcontracted entity of the University of Alicante (UA) and the Polytechnic University of Valencia (UPV), which are part of the consortium responsible for developing the project along with three Italian entities.

SONORA (evaluation of thresholds and impact, beyond acoustic pressure levels, linked to emerging blue growth activities) will carry out the evaluation of quantitative thresholds related to behavioural and physiological impacts on fish, based on the relationships between acoustic pressure and particle motion, to assess the impact of both variables.

SAES’s participation in SONORA will focus on conducting measurement campaigns of sound pressure levels and particle motion, and analysing the data obtained.

SAES is part of the consortium led by the Naval Technology Centre (CTN) that has been selected by the European agency CINEA (European Climate, Infrastructure and Environment Executive Agency) to develop the tender CINEA/2022/OP/0019 focused on building an open library containing a catalogue of individual sound signatures in shallow marine environments.

The project began its development in September 2023 and is scheduled to be completed in January 2025. The consortium is composed of seven entities from five European countries.

SAES’s participation focuses on data collection and the selection of AI-based algorithms, as well as their training and testing.

SAES is participating in the development of the METASUB project (November 2021 to November 2024), selected in the 2020 COINCIDENTE call (Cooperation in Scientific Research and Development in Strategic Technologies) by the Spanish Ministry of Defence.

The consortium responsible for the execution of METASUB is composed of the following entities: CTN (coordinator), Navantia, and SRG, with SAES participating as a subcontracted entity of CTN.

The METASUB project (Acoustic Materials for the Reduction of Submarine Signatures) is focused on implementing a methodology to obtain different configurations of panels, based on metamaterials, that improve the acoustic performance of the current panels on the superstructure of the Navy’s submarines.

SAES’s participation in METASUB focuses on the following areas: defining the configurations of interest for which the design, optimisation, and manufacturing will be customised, and defining the frequency ranges of interest for each application and the design objectives for the reduction of the electromagnetic signature.

Additionally, SAES participates in the definition and execution of a marine environment test to verify the real-world behaviour of a large object previously designed and manufactured, as well as in potential tests for acoustic and electromagnetic isolation and absorption at sea of a larger-scale sphere.

SAES is part of the consortium developing the ePark+ Project, selected for funding in the 2022 Science and Innovation Missions Call by CDTI, and supported by the Ministry of Science and Innovation. In addition to SAES, the consortium is composed of the following entities:

  • Navantia (Coordinator)
  • ABANCE
  • ARISNOVA
  • EOLOS
  • PERSEO TECH

Participating as subcontracted entities: Polytechnic University of Cartagena (UPCT), AICIA (University of Seville), and FIDESOL.

This is a collaborative project that will contribute to the technological development of offshore wind energy, started in December 2022 and will continue until January 2025.

The ePark+ project is focused on the research and development of various digital technologies for the Support of Operation and Maintenance (O&M) of offshore wind farms. The project aims to obtain a technological demonstrator of an Intelligent System for this function using unmanned vehicles, as well as the development of a prototype to demonstrate its operation in a relevant and controlled environment.

The system will consist of an Unmanned Surface Vehicle (USV), which will act as a mothership from which Unmanned Aerial Vehicles (UAVs) and Unmanned Underwater Vehicles (UUVs) will operate, as well as a remote control centre where all the information from the sensors of the unmanned vehicles will be centralised.

SAES’s contribution to the ePark+ programme focuses on underwater acoustic propagation and the monitoring of underwater infrastructures using sensors installed on the vehicles.

SAES’s participation in this project demonstrates the applicability of technologies originating from the defence sector to the civil sector, expanding the diversification of applications for these dual-use technologies. In the field of unmanned vehicle technology, SAES is an expert in their sensorisation for adaptation to various uses through the employment of artificial intelligence techniques.

SAES participates as a member of the consortium developing the BLUESIM project, selected in the 2023 call of the Naval Sector PERTE by the Ministry of Industry, Trade and Tourism.

The consortium is composed of 5 national entities and is coordinated by the company Clue Technologies. Its completion is scheduled for June 2025.

BLUESIM (Synthetic Training Platform for Autonomous UxVs) focuses on the research of a new type of training architecture for Artificial Intelligence (AI) systems based on deep learning. The project targets two initial applications: the characterisation of a synthetic marine environment for deep learning and the representation of Unmanned Surface Vehicles (USVs) and Unmanned Underwater Vehicles (UUVs) with synthetic systems.

SAES will lead two work packages within this project, related to: Characterisation of the marine acoustic environment, in which it will simulate the acoustic environment adapted to the operational conditions of the UxVs, and Simulation model of acoustic sensors and their interfaces, in which it will simulate a Side-Scan Sonar (SSS) and a forward-looking sonar. Additionally, it will participate in other work packages related to activities such as requirements definition, system architecture definition, and integration and testing of the complete system.