About Us


About US

Join the offshore experts – A lifetime of experience.

Castle Ship Technical Management operate specialist ship charter in conjunction with offshore equipment hire on a “vessel-plus-services” charter basis.

Each vessel has a unique capability to be provided to our clients with a fully mobilised spread of specialist equipment. Vessel and equipment ‘spread’ are provided as a full service package. Our ‘in house’ equipment and services are provided to the offshore contracting industry and include:

  •  OSV’s Flotel ‘Walk to Work’ accommodation supply and support vessels
  •  WROV Systems operations and rental
  •  I-GRAB Excavator & I-RAKE systems operations and rental
  • PSV’s Platform supply vessels
  •  Mass flow excavation systems
  •  DSV’s: ROV/AUV & Diving Support vessels
  •  Boulder & UXO removals
  •  Cable Ships: Subsea Cable lay spreads and cable repair systems
  •  Sub-Sea Specialists: Subsea ROV and seabed survey support vessels & systems
  • Survey: Hydrographic, Geotechnical & Environmental Survey support vessels
  •  Geotechnical: CPT / Vibracore / Multibeam / Seismic / ROV support vessels
  • OPR (Oil Pollution Prevention): Dispersals & incident response vessels
  • Boulder Removal: Boulders & Subsea clearance, mattress lay and seabed leveling
  • Salvage Ships: Salvage, towage, cargo runs, heavy lift, wreck recovery vessels
  • ERRV’s, Cargo, PSV, AHTSV operations

Castle Ship Technical Management

  • Established 1985, as NSPE and then trading from 1991 as Atlantic Marine then Atlantic Marine & Aviation LLP from 2011 the original family business closed in 2019 and a new team came together with additional management and expertise to form Castle Ship Technical Management in September 2019. CSMTL is a owned UK based business which primarily manages and operates large offshore specialist (ships) vessels for charter in the offshore renewables and “oil & Gas” sectors. 

    The business operates all group assets for charter on a global basis. The business works closely with an international group of asset managers based in Gibraltar, proving technical and commercial management, crewing and commercial services. A lifetime of expertise across air and sea based assets, and with an emphasis on customer service and professional, technical asset management.

    Offshore: The business employs a team of over 150 dedicated professionals and crew operating offshore ships in the specialist areas of offshore wind, sub sea operations, offshore construction, survey and platform support. The company managed vessels are all multi role capable, with an emphasis on specialist capabilities such as offshore accommodation, sub sea survey, cable lay and platform supply roles.

  • Offshore Ship sale and purchase
  • Offshore Ship Chartering division
  • Crew management division
  • Corporate compliance & management
  • International IMO certified D.O.C. (Document of Compliance) vessel managers
  • ISM International Safety Management Code operator
  • “Offshore” commercial vessel management specialists





Head Office: C3 Knoll Business Centre
325-327 Old Shoreham Road
Hove BN3 7GS. UK.

Marine Base: Berth 28, 244B Southdown Road, Great Yarmouth, Norfolk NR31 OJJ. UK.


+44 (0)1273 09 93 70

Charter Sales

+44 (0)1273 12 10 72

Crewing & HR

+44 (0)1273 09 93 74