4.5 km²
Covers up to 4.5 km², depending on environmental factors—suitable for wide-area protection of ports, harbors, and coastal infrastructure.
Sonar Security
When threats are silent, submerged and invisible, Halo’s underwater yacht defence system ensures they never go unnoticed. Using advanced sonar surveillance and AI threat analysis, our maritime security solution protects your vessel from unauthorised divers, drones and underwater incursions, before they surface.
Why Choose Halo’s Sonar Security For Your Protection?
Full Perimeter Awareness
Our maritime sonar defence system creates a 360° underwater shield around your yacht, detecting movement patterns and anomalies in real time, even in busy or murky waters.
AI-Driven Threat Classification
Using intelligent signal processing, the system distinguishes between marine life, diver propulsion vehicles and potential intrusions, reducing false alarms and enabling precise escalation.
Undetected, Immediate Protection
Halo’s sonar-based defence is passive, discreet and always alert. It operates in real time, alerting your security team before a threat breaches proximity, without disrupting your voyage.
Explore our range of other security services here.
300 W
Operating at an average of 300 W and peaking at 2,500 W during transmission, energy-efficient and well-suited for continuous use in remote setups.
0.0001%
With a false-alarm rate of under 0.0001%, the system ensures nearly all alerts are genuine, reducing distractions and increasing operational confidence.
50+ Tracks
It can show 50+ simultaneous tracks, giving operators real-time visibility of multiple underwater objects or potential threats without performance loss.
Key Features:
- Real-time 360° sonar detection
- Diver and UUV (unmanned underwater vehicle) recognition
- AI-enhanced signal classification
- Immediate alert transmission to onboard or remote security
- Compatible with Halo’s aerial, surface and onboard defence systems
- Scalable protection for yachts, tenders and harbour moorings
- Low-profile, non-disruptive installation
Purpose-Built For:
- Superyachts and mega yachts
- VIP tenders and chase boats
- Secure anchorages and private marinas
- Government, naval or diplomatic vessels
- Charter fleets requiring discreet security
Security Without Limits
Threats don’t always announce themselves. Beneath the surface, dangers move quietly, unseen and unchallenged. Halo’s maritime sonar defence system changes that. It forms an invisible perimeter around your yacht, integrating seamlessly with your surface and aerial security. Total protection. From the deep up.
Sonar FAQs
What is a maritime sonar defence system?
A maritime sonar defence system uses underwater acoustic sensors to detect, track and classify submerged threats such as divers or drones approaching your yacht. It creates an invisible security perimeter beneath the waterline, ensuring threats are identified before they reach critical proximity.
Why does a superyacht need underwater security?
Superyachts are increasingly targeted by silent, underwater approaches, from unauthorised divers to unmanned surveillance drones. A yacht sonar security system ensures early detection, giving your onboard or remote team time to assess and respond with precision.
Can this system detect divers and underwater vehicles?
Yes. Our underwater yacht security solution is engineered to identify a range of threats, including recreational and commercial divers, diver propulsion vehicles (DPVs), and small underwater drones. AI filters help minimise false positives while ensuring rapid response.
Is the sonar detection visible or intrusive?
No. Halo’s underwater surveillance system is discreetly installed and operates passively. It provides 24/7 monitoring without affecting the vessel’s performance, appearance, or onboard experience.
How is the sonar system integrated with other yacht security solutions?
The maritime sonar defence system seamlessly integrates with Halo’s full suite of protections, such as aerial drones, onboard security teams, and perimeter monitoring. This ensures a unified and intelligent response to both surface and submerged threats.
ALL PRODUCTS
ANTI-DRONE SYSTEMS
Discover how our cutting-edge anti-drone system detects, tracks, and neutralizes rogue drones in seconds.
ANTI-DRONE LASER
Unleash the power of precision with our high-energy laser system—designed to silently strike threats at the speed of light.
DEFENCE DRONES
Meet our next-gen defence drones—autonomous, intelligent, and always ready to protect what matters most.
THERMAL RADAR
Detect threats in total darkness or harsh conditions with 360° thermal imaging that never sleeps.
ANTI-SPOOFING
Safeguard your systems with cutting-edge technology that instantly detects and blocks identity spoofing attempts.
CCTV WITH ANALYTICS
Go beyond surveillance with smart CCTV that analyses behaviour, identifies anomalies, and alerts you in real time.
Sonar
Our sonar delivers AI-powered 360° underwater threat detection for yachts and vessels.
Robot Dog
Halo’s AI-powered robot dog delivers autonomous, all-terrain security for high-risk and high-value sites.
Private Security
High-end personal protection for high-net-worth individuals and executives. Our expert operatives offer seamless security at home, while travelling, or abroad.
Buried Cable Solution
Our invisible barrier beneath the ground delivers real-time detection, identifying intrusions early and securing perimeters with unmatched precision.
EMP
Advanced electromagnetic power detects, disrupts and neutralises hostile electronics, securing critical infrastructure and military perimeters with speed.
LRAD
Powerful, precise sound projection delivers clear communication and effective deterrence, giving your security teams control over threats at distance.
Latest News
Jul2025
Halo Group Security at the Monaco Yacht Show 2025
Halo Group Security is bringing next-level airspace protection to the Monaco Yacht Show 2025 with the debut of the HDDS-PM — a breakthrough drone defense system that takes control, not chances.
Jun2025
H-EMP: Halo’s Next-Gen Electromagnetic Pulse Power
a next-generation electromagnetic pulse system built to deliver re-targetable, non-kinetic power against drone swarms and electronic threats, giving defenders unmatched speed, precision, and dominance in the modern battlespace.
May2025
Meet Halo’s Newest Team Member: Our Robotic Dog with Global Reach
Halo’s newest team member isn’t just smart, it’s got four legs, a passport, and a mission to redefine security around the world.
