SeaMark puts safe, affordable explosive ordnance detection directly into the hands of coastal and riverine communities — using passive magnetometry that physically cannot trigger ordnance.
A towed passive magnetometer measures distortions in the Earth's magnetic field caused by ferrous metal in submerged ordnance — emitting zero energy.
Built for safety, simplicity, and the communities who need it most.
Passive magnetometers emit zero energy — no electromagnetic fields, no sonar, no acoustic signals. The physics makes it impossible to trigger ordnance. Operators never enter the water.
Magnetic fields pass through saltwater identically to air — unaffected by salinity, thermoclines, or turbidity. No infrastructure, no internet, no fuel needed. Solar rechargeable, 50+ hour battery.
Two operators, one small boat, half-day training. Color-coded display (green/yellow/red) with audio alerts. No expertise in magnetometry, sonar, or data processing required.
A complete detect → mark → map → share pipeline.
Clamp surface box, tow the sensor behind any small boat
Towfish senses magnetic anomalies from ferrous ordnance at 5–30m
App auto-drops GPS waypoint + optional physical buoy marker
Upload to the Marine Hazard Atlas — every survey protects every neighbor
While built for explosive ordnance, SeaMark's app, Atlas, and geofencing infrastructure are sensor-agnostic — adapting directly to other scenarios where communities need to mark, share, and warn about underwater dangers.
Mark subsea construction exclusions and cable routes
Geofence temporary contamination and spill zones
Mark protected habitats, coral, and no-take zones
Flag wrecks, rocks, and shallow obstructions
Explore the interactive Marine Hazard Atlas demo with simulated detections at real-world conflict and post-conflict locations.
▶ Launch Atlas Demo