Deck Decompression Chamber

Built to the highest quality.

Each offshore dive spread includes a 2-man, 2-compartment, containerised deck decompression chamber (DDC). The DDC is used to support emergency and therapeutic decompression and/ or planned surface decompression in a compact and efficient package. This is achieved by combining the decompression chamber hull, its control system, emergency gas storage and support equipment into a single containerised unit.

Our decompression diving chamber containers are used as essential equipment for all types of subsea operations from dive support vessels to salvage and research vessels.

Follows requirements stated in D023 DESIGN for Surface Oriented (Air) Diving Systems.





  • Length: 5.04 m
  • Width: 2.90 m
  • Height: 2.75 m
  • Weight: 9 tonnes

Dimensions: 1600 x 3600 mm
Volume: 6540 litres
Depth Rating: 50 MSW
Manufacturer: Hytech

  • Conforms with 97/23/EC (Pressure Equipment Directive)
  • Max occupants - 3 x main lock
  • Medical Lock fitted with interlock safety system
  • C-Tecnics DDC Intercom system
  • Silec Sound Powered Telephones
  • Hyperbaric Lighting
  • C02 Scrubber
  • DDC Heating System
  • Hyfex Hyperbaric Fire Extinguisher
  • SAT Systems 02 and C02 Analysers for chamber atmosphere analysis
  • DDC electrics backed up via Uninterruptible Power Supply and Automatic Transfer Switch
  • Emergency Onboard Supply – 10 x 50L HP Cylinders @ 200 Bar
  • Testing conforms with the latest guidelines laid out in D018 Code of Practice for the Initial and Periodic Examination, Testing and Certification of Diving Plant and Equipment
  • Follows requirements stated in D023 DESIGN for Surface Oriented (Air) Diving Systems
  • Hughes Subsea is a Diving and ROV contractor member of IMCA.
  • Hughes Subsea operates a certified integrated Business Management System comprising ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018, certified by DNV.
  • As a minimum all Hughes Subsea diving operations are conducted to IMCA guidelines.
DNVAssociation of Diving ContractorsIMCAInstitute of Explosives EngineersAchilles UVDB - Silver PlusAchilles Oil and Gas Europe - SilverAchilles UNCE - Silver PlusLloyds Register Approved Service SupplierConstructionline - Gold Member