Persistent Maritime Monitoring for Ireland's Exclusive Economic Zone

Ireland faces a critical maritime security gap. The Naval Service, operating at 65% of authorised strength, completed only 428 patrol days in 2024 — down from over 1,000 in 2020. Meanwhile, Ireland's Exclusive Economic Zone encompasses over one million square kilometres, carries 75% of transatlantic telecommunications cables, and has seen over 450 transits by Russian shadow fleet vessels in 2025 alone.

This paper proposes a complementary capability: a fleet of autonomous surface vessels providing persistent area monitoring of Ireland's maritime domain. Rather than replacing naval assets, these vessels would fill the patrol gap that crewing shortages have created, providing continuous surveillance at a fraction of the cost of conventional operations.

The key innovation is engineering simplicity: adapting proven all-weather lifeboat hull designs for autonomous operation. RNLI lifeboats have been refined over decades for precisely the sea conditions found in Irish waters. By starting with a platform already proven to survive North Atlantic conditions — self-righting, reliable, maintainable — the development risk is substantially reduced.

This approach creates Irish jobs in manufacturing, maintenance, and ground-based vessel operation, while aligning with EU defence funding priorities and Ireland's participation in PESCO maritime surveillance initiatives.

The Problem: Ireland's Maritime Capability Gap

Naval Service Capacity

The Irish Naval Service has an authorised establishment of 1,094 personnel. As of late 2024, actual strength stood at 719 — a shortfall of over one-third. This personnel crisis has directly impacted operational output:

The Naval Service fleet of eight vessels could theoretically deliver 1,600 patrol days annually. The 428 days achieved in 2024 represents just 27% of theoretical capacity. This is not a ship problem — it is a crewing problem.

Strategic Significance of Irish Waters

Ireland's maritime domain carries strategic significance disproportionate to the nation's size:

Subsea cables: 75% of transatlantic telecommunications infrastructure passes through or near Ireland's EEZ, carrying an estimated $13.3 trillion in daily financial transactions.

Energy interconnectors: The Irish Sea contains critical gas pipelines and electricity interconnectors linking Ireland and Britain.

Fisheries: Irish waters comprise 12% of all EU waters, with chronic enforcement challenges against illegal fishing.

Shadow fleet activity: In 2025, some 245 Russian shadow fleet vessels made over 450 transits through Ireland's EEZ, many poorly insured and representing environmental and sanctions-evasion concerns.

The EU's sanctions envoy publicly stated in July 2025 that Ireland "really needs to beef up our capacity and patrol and police our territorial waters." The gap between Ireland's strategic maritime significance and its monitoring capability is acute and widening.

The Solution: Persistent Autonomous Monitoring

Operational Concept

The proposed system provides continuous area surveillance through a fleet of autonomous surface vessels operating from Irish shore bases. These are not naval combatants — they are monitoring platforms providing persistent presence across patrol boxes that crewed vessels cannot cover.

Core functions:

• Vessel identification and tracking (AIS monitoring, visual/thermal imaging)
• Suspicious activity detection and reporting
• Environmental monitoring (pollution detection, marine protected area surveillance)
• Infrastructure proximity monitoring (subsea cable routes, offshore installations)
• Search and rescue support (grid searching, on-scene marker/relay)

When anomalies are detected, data is relayed to shore control for assessment and, where warranted, tasking of Naval Service or Coast Guard response. The autonomous vessels provide the eyes; crewed assets provide the response.

Technical Approach: Adapting Proven Platforms

The central engineering insight is to avoid reinventing the wheel. RNLI all-weather lifeboats represent decades of iterative development for survival in North Atlantic conditions. These vessels are:

• Self-righting (capable of recovering from capsize)
• Proven in extreme sea states (Force 8+)
• Designed for reliability (systems must work when lives depend on them)
• Maintainable (known service intervals, documented procedures, available parts)
• Hydrodynamically optimised for Irish and British coastal waters

The proposed approach takes a scaled-down all-weather hull form (8–10 metres) and adapts it for autonomous operation by removing crew accommodations and adding:

• Sensor suite (radar, AIS receiver, electro-optical/infrared cameras)
• Redundant satellite communications (Starlink maritime or equivalent)
• Autonomous navigation and collision avoidance systems
• Diesel-electric or hybrid propulsion for extended endurance
• Shore control interface for remote piloting and supervision

This approach inverts the typical unmanned surface vessel development risk. Rather than designing a new hull and hoping it survives harsh conditions, the starting point is a hull form proven to survive those conditions. The engineering challenge becomes adaptation, not invention.

Asset Protection: Counter-Drone Capability

Autonomous surface vessels operating in contested or surveilled waters require protection against drone threats. Ukrainian experience has demonstrated both the vulnerability of surface assets to small drones and the effectiveness of countermeasures.

Each monitoring vessel should incorporate:

• Drone detection radar/sensors (compact systems designed for small platform integration)
• Electronic countermeasures (RF jamming capability against common drone control frequencies)
• Situational awareness systems to alert shore operators to airborne threats

Counter-drone technology is a rapidly maturing field with significant European investment through the EDF. Compact, maritime-suitable systems are now commercially available. Integration of such systems protects the monitoring investment and ensures operational persistence in environments where hostile drone activity may occur.

Dual Use: Deployable Coastal Counter-Drone Capability

The drone incursion over Dublin Bay during President Zelenskyy's 2024 visit exposed a significant gap in Irish security capabilities. Unidentified drones operated in the flight path of a visiting head of state's aircraft, and Ireland had no rapid-deploy counter-drone assets to respond.

A fleet of counter-drone-equipped USVs, pre-positioned at coastal bases, could be surged to Dublin Bay, Cork Harbour, Shannon approaches, or any coastal location requiring temporary airspace protection. The same assets conducting routine EEZ patrol become, when needed, a deployable security capability for:

• VIP visits and state events
• Major public gatherings at coastal venues
• Port and airport perimeter protection
• Critical infrastructure security during elevated threat periods

Ireland's neutrality means self-reliance. These assets represent force multiplication without dependence on allies — a domestic capability that fills a demonstrated gap while remaining entirely consistent with Ireland's non-aligned status.

Ukrainian Precedent

The viability of small autonomous surface vessels for maritime operations has been conclusively demonstrated by Ukrainian forces in the Black Sea since 2023. The MAGURA V5 and Sea Baby unmanned surface vessels have:

• Conducted successful surveillance and patrol missions at ranges exceeding 400 nautical miles
• Operated reliably with satellite-based remote control
• Proven capable of sustained operations in contested maritime environments
• Been produced at unit costs of $250,000–$300,000

While the Ukrainian application has been primarily offensive, the underlying technologies — autonomous navigation, long-range communications, extended endurance, and latterly counter-drone self-defence — transfer directly to surveillance and monitoring roles. Notably, the EU has now explicitly enabled Ukrainian defence industry participation in European Defence Fund projects, creating a pathway for technology transfer and collaboration.

Economics: Cost-Effective Persistent Presence

Comparative Cost Model

A modern offshore patrol vessel costs approximately €50–60 million to procure and €8–10 million annually to operate when accounting for crew, fuel, maintenance, and shore support. When adequately crewed, such a vessel might deliver 150–180 patrol days per year.

The autonomous system does not replace the OPV — crewed vessels remain essential for interdiction, boarding, and response operations. Rather, it fills the 1,200+ patrol days per year that crewing shortages prevent the Naval Service from delivering. The result is dramatically improved maritime domain awareness at a fraction of the cost of attempting to crew sufficient conventional vessels.

Employment Model

The proposed system creates Irish employment across three areas:

Manufacturing: Hull construction and systems integration at an Irish yard, potentially drawing on existing boatbuilding expertise (e.g., Safehaven Marine, Cork).

Maintenance: Ongoing fleet support, leveraging established maritime maintenance skills and infrastructure.

Operations: Shore-based vessel operators monitoring and piloting assets from control centres in coastal communities.

The operations role is particularly significant. The Naval Service struggles to recruit and retain personnel because maritime careers compete poorly with shore-based alternatives — sailors can earn more without spending months at sea. Ground-based USV operators represent an entirely different labour market:

• Based in Ireland (Cork, Shannon, Donegal, or other coastal locations)
• Regular working hours with no extended sea deployments
• Technology-focused role attractive to younger workforce
• Potential transition pathway for Defence Forces veterans
• Skills transferable from maritime, aviation, software, even gaming backgrounds

This creates maritime jobs that don't require people to go to sea — addressing the fundamental retention challenge that has hollowed out the Naval Service.

Policy Alignment

Irish Defence Policy

Ireland's 2024 Defence Policy Review identified maritime security as "an area in urgent need of attention," highlighting severe deficiencies in protecting undersea communications, fisheries, and offshore energy infrastructure. The Review acknowledged the potential for maritime or hybrid attacks against critical infrastructure by foreign actors.

The Commission on the Defence Forces (2022) recommended moving to Level of Ambition 2 (LOA2), requiring a Naval Service of almost 1,800 personnel operating nine vessels with double crews by 2030. Current trajectory makes this target extremely challenging. Autonomous monitoring systems offer a complementary capability that does not depend on solving the crewing crisis.

Compatibility with Neutrality

This concept is explicitly non-lethal. The proposed vessels are monitoring platforms, not weapons systems. Their functions — fisheries protection, environmental monitoring, infrastructure surveillance, search and rescue support — are entirely consistent with Ireland's policy of military neutrality.

Ireland already participates in EU initiatives aligned with this capability. The PESCO project on Critical Seabed Infrastructure Protection (CSIP), which Ireland has joined, directly addresses the submarine cable security concerns this system would support. Ireland's engagement with the Common Information Sharing Environment (CISE) for maritime surveillance demonstrates existing commitment to enhanced monitoring.

Coast Guard Integration

This capability could be operated under Coast Guard coordination rather than Naval Service command. The Coast Guard, as a civilian agency under the Department of Transport, already coordinates search and rescue, pollution response, and fisheries monitoring. Autonomous monitoring vessels would extend these existing functions without raising defence or neutrality sensitivities.

Under this model, the vessels provide maritime domain awareness to all relevant agencies. When situations require armed response or interdiction, Naval Service assets are tasked. The monitoring function and the response function remain appropriately separated.

European Defence Funding

The European Defence Fund invested €910 million in 2024 to close capability gaps including drone defence and maritime surveillance. Small and medium enterprises accounted for over 38% of participating entities and received 27% of total funding. The EDF explicitly supports collaborative development of unmanned systems, maritime surveillance capabilities, and critical infrastructure protection.

For the first time, Ukrainian defence industries can participate in EDF projects, creating a formal pathway for the technology transfer and collaboration that this concept would benefit from.

Ireland has committed approximately €150 million to the EDF. An Irish-led or Irish-participating consortium developing autonomous maritime monitoring systems would align with both national priorities and EU funding criteria.

Implementation Pathway

Phase 1: Concept Development and Demonstration (Years 1–2)

• Naval architecture feasibility study on lifeboat hull adaptation
• Engagement with potential industrial partners (Irish boatbuilders, systems integrators)
• Development of single demonstrator vessel
• Controlled trials in Irish waters
• Engagement with Marine Institute, RNLI innovation team, and academic partners

Phase 2: Pilot Operations (Years 2–3)

• Small fleet (3–5 vessels) operating from single shore base
• Integration with Naval Service and Coast Guard operations
• Development of operating procedures and training programmes
• Evaluation of operational effectiveness and refinement of concept

Phase 3: Operational Capability (Years 3–5)

• Scale to operational fleet (15–20 vessels)
• Multiple shore control facilities covering Irish EEZ
• Full integration with national maritime surveillance architecture
• Potential for service provision to other government agencies and commercial customers

Potential Partners

• Safehaven Marine (Cork) — Irish builder of pilot boats and patrol craft
• Marine Institute — state agency for marine research and development
• UCC/NUIG marine research centres — academic expertise and facilities
• RNLI — potential collaboration on hull design and SAR support applications
• European USV developers — systems integration and technology transfer
• Ukrainian industry partners — operational experience via EDF collaboration

Conclusion

Ireland faces a stark gap between its maritime strategic significance and its capacity to monitor and protect its waters. The Naval Service's crewing crisis is structural and will not be quickly resolved. Meanwhile, threats to critical infrastructure, fisheries enforcement challenges, and environmental monitoring requirements continue to grow.

Autonomous surface vessels adapted from proven lifeboat designs offer a practical, cost-effective means to provide persistent maritime surveillance without depending on the recruitment and retention of scarce naval personnel. By starting with hull forms already proven to survive Irish waters, development risk is minimised. By operating from shore, the system draws on a different labour pool than the Naval Service and creates jobs in coastal communities.

This is not a replacement for the Naval Service. It is a complementary capability that fills a gap crewed vessels currently cannot cover. It aligns with Irish defence policy priorities, EU funding mechanisms, and Ireland's existing PESCO commitments — all while remaining fully consistent with military neutrality.

The technology is proven. The need is urgent. The policy alignment exists. What remains is the politics.