Civil Engineering

Diving Services supporting Inland projects to include Harbours, Ports & Marinas, Docks, and construction sites – Pwer Stations, Reservoirs, Lakes, Canals, Locks and Rivers, we offer a vast range of underwater engineering skilled services.

  • Lock gates maintenance
  • Underwater installations
  • Underwater instrumentation
  • Underwater pipeline
  • Underwater valves installation
  • Underwater valves repair
  • Pipework blanking
  • Underwater cable installation
  • Underwater Inspection
  • Underwater outfalls
  • Underwater outlets & intakes
  • Grilles & Trash screen installation
  • In-house bespoke fabrications
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Diving Services

Experienced HSE qualified divers for immediate response. Air divers and equipment to 50m working national and international availability.

  • Inspections
  • Surveys
  • Hazard Clearance
  • Diver Medic & Supervisors
  • Metal Detection
  • Precision Silt Removal
  • Ultrasonic Thickness Readings
  • Underwater CCTV Video
  • Marine Intervention
  • Railway Viaducts
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Safety Boats

CDMS SSE Limited stock in-house a large selection of safety boats from 6m and 9m RIBS to ex-Royal Marine landing craft we have the solution for all safety boat requirements.

  • Safety Boats
  • Bridge Maintenance
  • Scaffolding Erection
  • Filming Projects
  • Modular Platforms
  • Restricted Access Requirments
  • Bridge Inspections
  • Bespoke Water Access
  • Personel Transportation
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Film & Television

We have a unique facility at our Headquarter providing an underwater stage facility 6m deep because of this we have worked closely with Television and Film Companies for many years to include Sky, Channel 4 and the BBC so we have the experience to deliver a service second to none, meeting all underwater filming or photography projects on time and in the budget.

  • Safety Divers
  • Police Divers
  • Location Hazard Clearance
  • Cast Transportation & Safety
  • Underwater set installation
  • In-House Underwater Stage
  • Diving Facility 6m 45k gallons
  • Underwater Photography
  • Underwater Videography
  • Historical Diving Equipment from 1837
  • Military Diving Equipment
  • Stunt Divers HSE Qualified
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ROV (Remote Vehicles)

CDMS SSE Limited Carry a large range of bespoke ROV’s (Remotely Operated Vehicles) for underwater and land-based operations. On board Sonar is used for navigation in zero visability conditions and for target location in search and recovery applications.

  • ROV (remotely operated vehicles)
  • Side Scan Sonar
  • Sonar Surveys
  • Search & Recovery
  • Bed Profiling
  • Scour Assessments
  • Harbour Surveys
  • Underwater video
  • Diver Monitoring
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CDMS SSE LTD carries in stock over 250 tonnes of lifting bags. Our teams of Commercial Divers all have experience with the recovering a stricken vessel in freshwater rivers, estuaries, canals and offshore.

  • Lifting Bags
  • Boat Salvage
  • Cargo Recovery
  • Vehicle Savage
  • Water Pumps
  • Water Jetters
  • Deck Crane
  • Work Barge
  • Salvage Services
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Confined Space

Confined Space solutions for a diverse range of projects to include: Lift shafts, Culverts, drains, tunnels, wells and draw-off towers.

  • Inspections
  • Condition reports
  • Spindle replacements
  • Bespoke fabrication manufacture
  • Surveys
  • Diving services
  • Bespoke repairs
  • Penstocks
  • Flat valves
  • Installations
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UXO from two world wars has left an unwelcome legacy in peacetime. CDMS is able to provide a multitude of technical diving services with marine solutions to ensure that your project is safe and free of explosive remnants of war.

  • seamless integration
  • Sonar data
  • ROV investigation
  • Diver Intervention
  • Minimum delay and downtime
  • Diver Medic Technicians
  • Royal Navy Clearance Divers
  • Brimstone Bomb Disposal Technicians
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Underwater Cutting

Underwater cutting is a frequent diving service requirement for the removal of steel piles after construction projects. CDMS has a range of specialist ultra thermic cutting equipment capable of cutting steel in excess of temperatures of 3,000 degrees.

  • Pile cutting
  • Wreck removal
  • Compartment access
  • Chain removal
  • Fowled propellers
  • Underwater welding
  • Ship hull repairs
  • Bespoke underwater applications
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Mini Plastic Piling

CDMS are able to offer bespoke piling solutions for smaller bespoke and tailor-made applications supplying interlocking plastic piles for flood defence.

  • River-bank fortification
  • Plastic piles
  • Bespoke applications
  • Property protection
  • Flood prevention
  • H Beam and concrete panels
  • Flood limitation
  • Boat & Pontoon Moorings
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50 foot Crane Barge

CDMS SSE Ltd have a fully re-fittted and total refurbishment 50 ft barge with deck crane. The barge has been fitted with hydraulic spud legs to stabilize and assist support the deck cranes operation during heavy lifts.

  • Surface Welding
  • Plate installation
  • Pile repairs
  • Patch repairs
  • Anode installation
  • Shutter fabrication
  • Underwater fabrication
  • Underwater welding
  • Coded Welders
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Obstruction Removal

Obstructions come in a variety of shapes and sizes from mud and silt build up to wreckage and fallen masonry. Each element requires it’s own unique method of removing, all of which CDMS has the capacity to deliver.

  • Precision Silt Removal
  • High-Pressure Jetting
  • Mooring Clearance
  • Accumulative Debris Removal
  • Vegetation Removal
  • Sunken Pontoons
  • Wreck Demolition
  • Environmental Cleanup
  • Redundant Structures
  • Mud & Silt Excavation
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CDMS SSE Ltd has a long, robust history, which began initially with the formation of Commercial Diving and Marine Services in early 1971. Since then the company’s name has changed, but the retention of the founding spirit has remained resulting in innovation dedication and reliability. Now after 48 years providing diving services in the civiil and marine industry, the company can call on a wealth of experience gained over literally thousands of projects that have been successfully completed with a 100% safety track record. Over the years professional association with new clients and other organizations have further strengthened the company’s versatility, exposure, and commitment to deliver the best services available. This has resulted in CDMS SSE Ltd becoming an Industry leader in their specialist field of operations in Marine Construction, Utilities and Infrastructure and Maritime support worldwide.

The divers at CDMS SSE Ltd are fully qualified to the health and safety diving operations at works regulations and adhere strictly to the approved codes of practice. Furthermore, each diver has an annual medical examination to confirm good health and peak physical fitness. Our diving teams are trained in casualty handling, CPR and also hold first aid qualifications.

Project Diversity

CDMS Sub Surface Engineering Limited

A Leading Company in the Commercial Diving and Civil Engineering Industry since 1971

Our diverse and experienced teams of Commercial Divers enables CDMS Sub-Surface Engineering Limited
to offer its customers a complete and cost effective solution to Civil and Marine projects
within the Civil Engineering Industry.

Diving Services for Harbour & Sea Defences

Recent project diversity has found CDMS SSE Ltd expanding its service to locations as far as the South Atlantic to UK based Harbour and Sea Defence projects and marine construction operations in Northumberland, Dublin and Orkney.

Crane Barge Refurbishment

CDMS SSE Ltd has recently completed a full re-fit and total refurbishment of their 54-foot work boat with deck crane. The barge has been fitted with hydraulic spud legs to stabilize and assist support the deck cranes operation during heavy lifts.

ROV Remotely operated vehicles

CDMS SSE Ltd ROV Systems enable a safe and effective form of investigation on projects where diving personnel is not able to access without an initial safety survey. The ROV systems are also a valuable tool in the recovery of an object or missing persons.


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    Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including works like roads, bridges, canals, dams, and buildings. Civil engineering is the second-oldest engineering discipline after military engineering, and it is defined to distinguish non-military engineering from military engineering.

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    Construction Work is a term for the process of adding structure to real property or construction of buildings, bridges, viaducts, basins, canals and river walls. All building construction projects include some elements in common – design, financial, estimating and legal considerations.

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    CDMS SSE LTD carry in stock over 250 tonnes of lifting bags. Our teams of Commercial Divers all have experience with the procedures of recovering a stricken vessel in fresh water rivers, estuaries, canals and at sea.

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    A confined space is one which is both enclosed, or largely enclosed, and which also has a reasonably foreseeable risk to workers of fire, explosion, loss of consciousness, asphyxiation or drowning.

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    CDMS SSE Ltd stock a large selection of safety boats from 6m and 9m RIBS to ex Royal Marine landing craft we have the solution for all safety boat requirements.

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    UXO - Diving Services

    CDMS SSE Ltd working together with BRIMSTONE UXO to deliver a first class service in the detection and removal of unexploded ordinance.

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    We have worked closely with the BBC for many years and have the experience to deliver a service second to none, meeting all underwater filming or photography projects on time and in budget.

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    CDMS stock a large selection of ROV systems to meet any project brief. The benefits of using this type of equipment are that ROV’s can go down longer and deeper having not restrictions with time unlike a diver, who is limited to depth and time.

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    Our Work Boat with Deck Crane is ideally suited for marine salvage operations, heavy lifting, dive support, pipe laying, pile driving, and inland marine construction.

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    CDMS has a vast in-house stock of specialist equipment, this means the company has the ability to meet all project fully prepared and well equipped to complete the task, on time and in budget.

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    CDMS SSE Ltd take Health & Safety very seriously hence the company has a 100% safety track record. It is important to follow the guidance of other professional bodies to include CHAS and Achilles to remain safe in the working environment.

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    CDMS SSE Ltd has a containerized portable decompression chamber for onsite decompression safety of diving personnel.