Maintenance

• Plugging and Blanking Maintenance: With countless hard-working valves and pipes in place on every vessel, it is no surprise that these important elements also need regular maintenance and renewal. Regular care can reduce avoidable down time and expense.
• Echo Sounder and Doppler Speed Log Maintenance/Renewal: Dive Marine Services has 10 years’ experience in carrying out renewal, repair and installations, such as  Japan Radio Company (JRC) and equivalent echo sounder and Doppler speed logs.

• Civil engineering work and related diving support
• Propeller Maintenance
• Afloat repairs and maintenance
• Air lifting
• Ancillary support – new build oil rigs, conversions, FPSO, FSO, accommodation platforms etc
• Anodes and ICCP renewal
• Ballast tank inspection
• Bathymetric survey
• Docking of vessels
• Fender replacement
• Inspection of seabed for high spots/foreign objects and retrieval
• Installation of anchor bolts
• Navigational buoys annual inspection, refurbishing, replacement and positioning
• Quay wall maintenance
• Rope guard installation
• Rudder repair and maintenance
• Salvage
• Seabed survey
• Spud cans inspections
• Structural coring
• Thruster installation and turnkey projects
• Ultrasonic thickness gauging
• Underwater civil engineering works, i.e. underwater pile cutting of piles, welding etc
• Underwater pile wraps and jackets installation

• Underwater Hull Cleaning: We use a broad range of sustainable services including Remote Operated Vehicle (ROV), the Typhoon MC311 and the Brushkart in addition to innovative technologies for debris collection and filtration customised to the needs of the specific vessel in our care.

• Underwater hull cleaning (including NZ MPI requirements)
• Propeller cleaning & polishing
• Hull cleaning with debris reclaim & water filtration
• Remote Operated Vehicle (ROV) cleanings

Learn about our biofouling cleaning management here.

DM Group Services is an industry leader in providing underwater and at-height inspection services to multiple industries. Our inspection divers are adept in identifying and visually assessing for structural deterioration and damage as well as the overall condition of ships and other subsea structures such as terminals, jetties, piers, berths, modus and platforms. Our methods include:

 

• General underwater Visual Inspection: Still colour photography remains a commonly used and relatively inexpensive method which produces a permanent, detailed record of an asset’s condition. This is carried out by a team of divers.
• Underwater Closed Circuit Television and Videography: The use of CCTV and video have become an essential tool  in most underwater inspection operations and in-water surveys for dry dock extension. This approach gives us better overall information  and has the advantage of providing real time viewing during or after the inspection. “Live” communication and visuals between the client representatives and our divers can be maintained throughout the inspection.  This important two-way communication means the client and divers can work in sync to identify and collectively address any issues, and have a permanent record of the entire process.
• Close Visual Inspection: This is a more detailed inspection of a component or specific section of a structure to ascertain if there are defects such as physical or corrosive damage, or weld cracking  This is conducted by a dive team and requires thorough SA standards cleaning.
• Remotely Operated Vehicle (ROV:) ROVs are manned by ROV pilots which are highly manoeuvrable underwater robots that allow us to understand what is happening under your vessel with minimal diver intervention. ROV inspection allows ship owners to proactively manage maintenance, fuel efficiency and security to determine optimal cleaning and paint schedules.Without needing to deploy dive teams, ROV inspection leads to a safer process with unnecessary down-time or lifting the boat out of water.  It also becomes easy to access and inspect areas that might be too small for divers.
• Specialised Ship Inspection and Surveys: these includes hydraulic surveys, magnetometer surveys, side scan surveys and multibeam ultrasonic surveys.

• UWILD class inspection
• Vessel inspection
• Vessel inspection with New Zealand standard
• Pipeline inspection/installations
• Seabed inspection
  • Hydrographic surveys
• Water tank inspection
• Class Hull integrity inspection
• Baseline inspection
• Class inspection surveys