Site investigation that gets to the bottom of your project
When you know what’s happening below the waterline, you can make confident design, development and commercial decisions. But only if your data has been captured accurately.
For confidence in your decisions, you need confidence in your data
Drawing from decades of offshore survey vessel experience, our team guides clients through the complex, costly process of seabed investigations with precision and care. We collaborate closely with you to design, procure, manage, and interpret data acquisition, while our fully qualified representatives act as your advocates aboard vessels, ensuring high-quality data collection backed by round-the-clock onshore support.
From initial planning through completion, we maintain rigorous quality standards as our experienced geoengineers verify all data both offshore and onshore. Ternan continues supporting your project through reporting and laboratory phases, providing expert guidance on testing requirements and thorough quality checks of contractor deliverables. Working as your integrated partner, we ensure every piece of information collected serves your project needs, optimising foundation design and mitigating installation risks throughout the entire process.
Our site investigation services include:
Planning Options
Guiding you through complex seabed surveys to optimise foundation design and mitigate installation risks.
Operational Support Options
Providing qualified client representatives onboard with 24/7 onshore technical support.
Data Review Options
Ensuring collected data meets required standards for accurate ground modeling and design work.
Our service lifecycle
01.
Demystify your site and make sure it’s fit for development with services including survey design, ground modelling and data interpretation.
02.
Plan for development with meticulous design and engineering services including foundation design and cable burial risk assessment.
04.
Find out precisely where you stand with expert due diligence, contract advice and dispute resolution services.
03.
Keep your project on spec and on budget by letting us oversee outsourced site surveys and construction activities.
01.
Demystify your site and make sure it’s fit for development with services including survey design, ground modelling and data interpretation.
02.
Plan for development with meticulous design and engineering services including foundation design and cable burial risk assessment.
03.
Keep your project on spec and on budget by letting us oversee outsourced site surveys and construction activities.
04.
Find out precisely where you stand with expert due diligence, contract advice and dispute resolution services.
Client feedback
What do our clients think?
We make a measurable difference for our clients. Here’s an example.
Take a deep dive into how our geophysical, geotechnical and ocean engineering expertise brings tangible benefits to a project.
Delivering Expert Offshore Client Representation for Vattenfall Zeevonk
The Challenge Vattenfall's ambitious Zeevonk offshore wind farm—projected to deliver 2GW of wind power alongside a 50MWp floating solar farm—faced the complex challenge of conducting comprehensive site investigations 62km off the Dutch coast. As a joint venture...

Delivering Expert Offshore Client Representation for Vattenfall Zeevonk
The Challenge Vattenfall's ambitious Zeevonk offshore wind farm—projected to deliver 2GW of wind power alongside a 50MWp floating solar farm—faced the complex challenge of conducting comprehensive site investigations 62km off the Dutch coast. As a joint venture...
FAQs
How long until site investigation data is available?
Typically it can take many months to turn site investigation data into a ground model. However we have developed software that provides a preliminary visualisation of site data – such as bathymetry and seabed composition – in as little as 24 hours. It enables you to react quickly to initial survey findings, transforming the speed at which key decisions can be made among the stakeholders in your project. Ask us for more information.
Do you have the right expertise?
Ternan Energy is a highly specialised team of geophysical, geotechnical and ocean engineering experts. We have provided insight on site investigations all over the world. And we can do the same for you.
How quickly can you react to my project?
Because we are an independent specialist, we can stay nimble and responsive to incoming projects. It’s all about capturing the data you need, while remaining sensitive to your deadlines and timeframes. Try us.
Why work with Ternan Energy?
Our clients come to us for undiluted honesty. That’s possible because we are a completely independent and impartial company. There’s no referring you to the services of partner or parent companies. And no recommending work that isn’t necessary. The advice we give will always be rooted in the best interests of your project. Just the way it should be.
Any questions?
Just ask.
If you have any questions or would like to discuss a project, it’s easy to get in touch.