SeaTerra

What SeaTerra does

SeaTerra generates revenue through project-based professional services contracts, with engagements spanning multi-year durations and pricing quoted per project based on area coverage, depth, sensor systems required, and regulatory complexity. The go-to-market motion is direct B2B sales-led engagement with enterprise and government clients, supported by a multilingual website (German, English, French, Dutch, Polish), industry event participation such as Kiel Munition Clearance Week 2025, and earned media including an ARTE documentary on North and Baltic Sea munitions work. The company claims zero accidents or major incidents on offshore projects and over 65 completed large-scale demolitions, positioning safety track record as a primary commercial differentiator. Recent organizational investments include ESG strategy development aligned with ISO 14001 (2023-2024) and active recruitment of certified §20 SprengG explosives experts, indicating capacity build to serve growing European offshore wind demand.

Name

SeaTerra

Legal name

SeaTerra GmbH

Website

https://seaterra.de

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

51–100 employees

Short description

SeaTerra GmbH is a German family-owned specialist firm providing unexploded ordnance (UXO) survey and clearance services for offshore wind developers, construction companies, port authorities, energy infrastructure operators, and government agencies across European waters.

Ownership category

akta.pro rank

Product category

UXO Survey and Clearance Services

NAICS

Geophysical Surveying and Mapping Services (541360), Support Activities for Water Transportation (4883)

SIC

Search, Detection, Navagation, Guidance, Aeronautical Sys (3812)

akta.pro primary industry

Underwater Inspection, Maintenance & Repair (UWILD, Diving/ROV, In-water Cleaning) (IMAJAFAJ)

akta.pro secondary industry

Nautical Safety, Navigation Aids & Hydrographic Services (TLAHAFAE)

Keywords

• UXO survey services
• Explosive ordnance clearance
• Marine geophysical surveying
• Offshore wind site investigation
• Munitions detection

Headquarters

HQ city

Wandlitz

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales

Revenue model

1. UXO Survey Services: Geophysical survey services for detecting unexploded ordnance on land, offshore, in rivers, lakes and ports using various sensor technologies including magnetometers, electromagnetic systems, and drones. Charged per project based on area surveyed or scope of work.
2. UXO Clearance Services: Physical clearance and removal of unexploded ordnance including excavation, recovery, and demolition services. Includes offshore clearance for wind turbine foundations and cable installations, as well as land-based construction clearance.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

SeaTerra GmbH provides professional unexploded ordnance (UXO) survey and clearance services across land, offshore, rivers, lakes, and ports. The company uses magnetometers, electromagnetic sensors, ROVs, drones, and proprietary inversion algorithms to detect, identify, excavate, and demolish UXO (primarily World War-era munitions) for construction companies, offshore wind developers, port authorities, pipeline operators, and government agencies in Germany and Europe. Services span geophysical survey, physical clearance and recovery, demolition, and supporting marine geophysics work, delivered via an owned fleet of 12+ specialized vessels.

Product overview

SeaTerra GmbH is a specialist UXO (Unexploded Ordnance) survey and clearance company offering a comprehensive, integrated portfolio of services across land, marine, and aerial domains. The core portfolio consists of six principal service lines: Offshore UXO Clearance, UXO Clearance on Land, Offshore UXO Survey, UXO Survey on Land, UXO Surveys in Rivers/Lakes/Ports, and Marine Geophysics. These are complemented by two specialized detection platforms — the UXO Drone Survey (a drone-based magnetic acquisition system) and UXO Clearance with Crawler — which extend reach into difficult terrain and environments inaccessible to conventional survey methods. Supporting the entire service delivery is SeaTerra's owned fleet of 12+ survey vessels, boats, dive/support vessels, and pontoons, which provide the operational platform for all marine geophysical work. All survey data is processed using SeaTerra's proprietary inversion algorithms for 2D/3D analysis. The company operates as a §7 SprengG-licensed specialist firm and a family-owned business headquartered in Germany.

Differentiator

Problem solved

Functional benefit

Products and services

• Offshore UXO Clearance Professional clearance and removal of unexploded ordnance from underwater environments, using methods such as 3-axis gradiometers, total field magnetometers, electromagnetic technology, ROVs, divers, and remote-controlled manipulators to locate, excavate, identify, and demolish underwater munitions. Built for offshore wind developers, port authorities, pipeline operators, and construction firms operating in the North Sea and Baltic Sea.
• UXO Clearance on Land Land-based unexploded ordnance clearance services ranging from point-by-point clearance to construction-phase clearance and large-area separation systems. Uses manual digging, excavators, shaft rings, sieves, magnetic separators, and eddy current separators to remove UXOs before soil is refilled, targeted at construction firms and engineering consultancies building on potentially contaminated sites.
• Offshore UXO Survey Marine unexploded ordnance survey using total field magnetometers (TMI), 3-axis magnetometers, electromagnetics on ROV, and sub-bottom profilers deployed from platforms including land/shallow water arrays, underwater fixed frames, towed underwater current meters (ROTV), and remotely operated vehicles (ROV). Survey data is analyzed using SeaTerra's proprietary inversion algorithms in 2D and 3D, serving offshore wind developers, pipeline operators, and port authorities.
• UXO Survey on Land Land-based UXO survey using total field magnetometers (G822, G882), 3-axis gradiometer, fluxgate sensors, EM 61 electromagnetic system, CPT-TFG magnetometer, and GSSI ground radar, covering military training grounds, inner-city areas, tidal flats, and pipeline routes. Targets construction companies, engineering consultancies, and infrastructure developers needing pre-build site investigation.
• UXO Surveys in Rivers, Lakes and Ports UXO survey for inland waterways, lakes, and nearshore areas using flexible sensor platforms and ROV-supported water sounding, with high-resolution magnetometers for ferromagnetic object detection and electromagnetic procedures for areas with external magnetic interferences such as sheet piling or slag bricks. Ships range from canoes to 20 m vessels, covering 0.4 to 20.0 m depth, for port authorities, waterway operators, and harbor clients.
• Marine Geophysics Wide spectrum of marine geophysical surveying technologies including total field magnetometer (TMI), vertical and horizontal gradient magnetometer, time domain electromagnetic sensors (TDEM), side-scan sonar, multi-beam sonar, Blue-View sonar, and sub-bottom sonar, covering preliminary marine exploration, geological investigations, route/cable/pipe location, bathymetry, obstacle location, and scientific investigations for offshore wind, pipeline, and port clients.
• UXO Drone Survey Drone-based magnetic survey system for UXO detection using three Fluxgate magnetic sensors with disturbance compensation from flight movements and electric rotors, designed for difficult terrain such as moors, wet meadows, beaches, mud flats, shallow water, military training areas, deserts, and scree fields. Delivered to construction firms, military site operators, and infrastructure developers needing access to terrain inaccessible to ground or marine platforms.
• UXO Clearance with Crawler UXO clearance service using crawler vehicles designed for challenging terrain and environments that are inaccessible to conventional survey methods, referenced in the navigation menu as a specialized service offering alongside drone surveys for land-based munitions clearance projects.

Quantifiable outcome

• Zero accidents and major incidents on all offshore projects completed to date
• +2 more outcomes

Named customers15 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature5 records

Scale indicators5 records

Recent moves5 records

Expansion highlights5 records

Broad incumbents

• Fugro: Global leader in geo-data and site characterization, providing marine site investigation, geotechnical, and survey services for offshore wind, oil and gas, and infrastructure. Offers overlapping geophysical survey capabilities to SeaTerra, though UXO is a smaller part of a much broader portfolio.
• DeepOcean: Norwegian subsea services provider offering UXO survey and clearance, subsea installation, and IRM for offshore wind and oil and gas clients. Comparable in offshore UXO and marine geophysical capabilities, though DeepOcean operates across a broader subsea services portfolio.
• TAUW Group: European environmental and engineering consultancy with a UXO and soil quality practice serving construction and infrastructure clients. Overlaps with SeaTerra's land-based UXO survey and clearance services but operates primarily as a consultancy rather than dedicated contractor.
• Wessling Group: German analytical and environmental services company offering environmental consulting, soil investigation, and remediation services including UXO-related work. Operates in adjacent environmental services territory in Germany with partial overlap with SeaTerra's land UXO and site investigation offerings.
• Boskalis Westminster: Dutch marine contracting giant offering dredging, offshore energy, marine survey, and salvage services globally. Adjacent competitor in offshore wind site preparation and survey work, though its UXO exposure is modest relative to its broader marine services portfolio.
• DEME Group: Belgian marine engineering, dredging, and offshore energy contractor with offshore wind, cable installation, and seabed preparation services across Europe. Comparable in marine survey and offshore wind site preparation, overlapping with SeaTerra's offshore client base.

Direct peers

• N-Sea Group: Dutch subsea services firm providing UXO identification and clearance, subsea cable installation, and IRM services for offshore wind and oil and gas clients across the North Sea. Operates in the same offshore UXO clearance niche as SeaTerra, with overlapping magnetometry and ROV-based detection capabilities.
• BACTEC International: UK and Germany-based specialist in UXO risk management, detection, and clearance for offshore, land, and marine projects. Directly competes with SeaTerra in European offshore wind and cable route clearance, with overlapping magnetometry and ROV survey capabilities.
• Ordtek: Land-based UXO risk management, detection, and clearance specialist serving construction, infrastructure, and renewable energy developers. Comparable to SeaTerra's land-based UXO survey/clearance line of business, with overlapping magnetometry and EM sensor deployments.
• M3 Marine Group: UXO identification and clearance contractor for offshore wind, subsea cables, and marine infrastructure projects in European waters. Highly comparable to SeaTerra in service portfolio, customer segments, and survey-driven delivery model.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SeaTerra