Sirehna
Since 1986, SIREHNA has been designing and developing high-tech solutions for the maritime sector.
A 100% subsidiary of Naval Group since 2012, the company relies on recognized expertise, advanced technological know-how, and a strong culture of innovation. With nearly 150 employees, SIREHNA operates in France and internationally, making naval platforms more autonomous, stable, efficient, and intelligent.
SIREHNA’s activities cover five key areas:
- Engineering and consultancy services: designing and optimizing naval platforms
- Autonomous vessels: developing intelligent navigation systems
- Testing and experimentation: validating innovative solutions under real-world conditions
- Platform dynamics: improving stability and performance
- Enhanced perception: processing data and providing decision-support solutions
The DP SIREHNA system is a certified, fully customizable dynamic positioning system (DP0, DP1 and DP2) with joystick control system as well as a trajectory control system (TCS).
At low or high speeds, the SIREHNA dynamic positioning system and autopilot automatically maintain the vessel’s position and heading using the propulsion already installed on board.
The standard control modes available are: Joystick Manual, Joystick Auto / Combined, Station Keeping and Auto-Track.
The standard control modes available are.
Other modes or features can be added for specific applications: Follow Target, Auto Area, Anchor Mode, Jack-up Function, Onboard Training, Onboard Capability plot and Heading / Track Keeping (high speed).
The SIREHNA maritime optronic surveillance system, MOS, offers automatic detection, tracking and geolocation of any potential threat on the surface.
MOS can detect moving or stationary objects appearing anywhere within a radius of 0.5 m to 200 m, whatever the sea conditions (up to force 4+).
MOS offers automatic camera tracking and identification, as well as real-time analysis based on specific criteria (position, speed and trajectory).
MOS consists of one or more graphical interfaces with video display, radar view, alarm monitoring and zoom. MOS can display up to 6 thermal cameras, with video stream analysis, pan/tilt zoom control and 360° coverage.
SIRSEA® (Standard Remote Operation System) is a complete solution designed to transform all types of platforms into autonomous or remotely operated vessels.
The solution includes a complete onboard system — control cabinet, platform interfaces, secure communications, and navigation sensors — as well as a remote control station, enabling real-time supervision and full control of the platform.
SIRSEA adapts to the operational requirements of each mission: communication systems, payload integration, piloting functions, levels of automation, additional sensors, and specific interfaces.
SIRSEA can be installed on a new-build vessel or retrofitted onto an existing platform. SIREHNA supports you throughout your drone conversion project, from the design phase to system installation and commissioning, and also provides remote operator training and operational maintenance services for the system.
Surveillance portuaire et côtière
SIREHNA offers services and products in the field of maritime safety and security in both civil and military domains.
Alongside our partner 432 Technologies, SIREHNA also develops aviation course prediction tools for safe naval helicopter landing operations.
SIREHNA is an expert in dynamic behavior of naval platforms since 1986. SIREHNA markets a range of services and products in the fields of navigation systems, maritime surveillance solutions, marine robotics and scientific engineering.
Surveillance optronique maritime
La solution de Surveillance Optronique Maritime de SIREHNA permet de detecter, pister et géolocaliser des menaces potentielles à la surface.
Le système permet le pistage et l’identification automatique de cibles sur le plan d’eau et une analyse en temps réels de ses caractéristiques (position, vitesse, cinématique).
La solution logicielle permet de synthétiser à l’opérateur les données RADAR et optroniques, la gestion des caméras et la remontée d’alertes.
MARGO
MARGO est un système de SHOL dynamique et de prédiction de trajectoire aviation pour assurer en sécurité et avec efficacité des opérations d’atterrissage et décollage d’helicoptères sur des pateformes navales.
Le système a reçu le prix AUDACE décerné par la Marine française en mai 2021.
SIREHNA is based in Nantes (research and development, engineering office, production) and Saint Mandrier (production, testing center).
SIREHNA has a ISO 9001 certified Quality Management System since 2012.
SIREHNA is a fully-owned subsidiary of Naval Group.
SIREHNA adapts its products and services to the different needs of its customers, covering all maritime sectors and types of operations, both military and civilian.
Here are just a few of the companies that have placed their trust in us: Naval Group, DGA, Seaowl, JifMar, Nokia…
Concepteur, design, ingénierie, réglementation
Équipements embarqués – couche basse
Équipements et logiciels embarqués pour l'autonomie
Intégrateur système d'ensemble capacitaire
Plateformes et vecteurs physiques
Recherche, essais et formation
Systèmes de mission (C2 / C3, etc.)
SIREHNA provides a wide product range covering USV and platform-agnostic autonomous C2 systems:
- The SEAQUEST® 930, a multi-role USV dedicated to surveillance and protection for military and civilian applications;
- The USV 420 and USV 765, robust and cost effective USV, designed for versatility on a semi-rigid platform;
- SIRSEA® autonomous C2 system, transforms your platform into a USV
SIREHNA supports you throughout your project, from design to commissioning, operator training and maintenance services.
For over 30 years, SIREHNA has been a major player in the automation of navigating platforms. With more than 150 onboard systems at sea, SIREHNA is a specialist in naval hydrodynamics, motion prediction optimization, dynamic control and autonomy of naval platforms (dynamic positioning, autopilots, stabilization, tranquillization, unmanned systems).
SEAQUEST® 930
Le Seaquest® 930 est un USV multi-role, dédié notamment à la surveillance et protection pour des applications militaires comme civiles. L’USV combine modularité, rapidité et un large champs d’action dans un design compact, lui permettant d’être déployé depuis un navire-mère ou depuis un port. Le Seaquest® 930 est produit en collaboration avec le chantier naval Couach.
USV 420
L’USV 420 est un semi-rigide dronisé de 4.20m, conçu pour fournir une capacité dronisée à coûts maîtrisés, robuste et rapidement déployable en opération.
Simple à mettre en oeuvre et à opérer, ce drone peut être déployé depuis la côte ou depuis un navire-mère, pour réaliser des expérimentations, des missions d’entrainement ou déployer de petites charges utiles.
USV 765
L’USV 765 est un drone de surface conçu sur la base du RHB PRORAID 765 du chantier naval Sillinger.
Cet USV combine puissance, stabilité et robustesse, pouvant atteindre une vitesse maximale de 40 noeuds pour des missions cotières et hauturières. Prévu pour être modulaire, cet USV permet d’emporter et de déployer une grande variété de charges utiles, lui permettant d’opérer dans une large gamme d’opérations (inspection, patrouille, applications de défense et de sécurité).
SIRSEA®
Le système de dronisation SIRSEA® permet de transformer votre embarcation en navire autonome. Modulaire, performant et résilient, le système SIRSEA® peut être déployé sur une plateforme neuve ou en modernisation d’une plateforme existante et fournit une situation maritime, capacité de navigation autonome et gestion de charges utiles à l’état de l’art.
La solution inclus le système embarqué de contrôle-commande de la plateforme, sa solution de communication sécurisée, son système de gestion de senseurs de navigation et de charges utiles, ainsi que la station opérateur, fournissant une supervision et un contrôle complet de la plateforme en temps réel.
SIREHNA is based in Nantes (research and development, engineering office, production) and Saint Mandrier (production, testing center).
SIREHNA has a ISO 9001 certified Quality Management System since 2012.
SIREHNA is a fully-owned subsidiary of N
SIREHNA’s unamnned surface vessels are currently commercialized and have been deployed in various naval exercises including REPMUS 2025 (NATO), TFX Baltic Sentry 2025 (NATO), DANAE 2026 (France).