This 300 mtr (30 Bar) twin lock decompression chamber was originally manufactured in 1981 by Seaforth Engineering and fully refurbished in 2008. This work in full: shotblasted and repainted new insulation and over cladding internal outfit and external outfit new viewports. The details of this chamber are as follows:

Six-man twin lock living decompression chamber. The Main lock DDC 1 is fitted with 6 bunks medical lock and end manway with pressure retaining door. The entry lock TUP 1 having 1 x end manway fitted with equipment lock 1 x top manway for bell mating and 2 x side manways to allow mating to other chambers or SPHL.

The chambers are mounted on individual heavy-duty base frames with all services pre-piped to and from the Chamber via local penetrator plates mounted on the base frames.

6 Man Main Lock Designated DDC1 rated at 300 MSW Outfitted approximately as follows:

Pipe work and valves (NPT)
Electrical system 24V. DC.
2 x Internal Habitat Conditioning Units HCU.
2 x Emergency C02 scrubbers.
1 x sound power phone.
1 x speaker bull horn.
6 x call button.
6 x diver personal communication.
1 x hyperbaric fire extinguisher.
6 x hyperbaric bunk lights.
3 x hyperbaric chamber lights.
1 x caisson gauge.
1 x temperature and humidity gauge (Hygrometer)
6 x bunks
Chamber aluminium flooring
7 x Bibs overboard dump mask connection points 2 x manifold block and 2 x Tescom back pressure regulators
1 x temperature sensor.
1 x humidity sensor
Medical lock with Safety interlock
1 x Emergency Heaters


Entry Lock Designated TUP 1 to SDC rated at 300 MSW and Outfitted as follows:

Pipe work and valves (NPT)
Electrical system 24V. DC.
1 x internal Habitat Conditioning Unit (HCU)
1 x Emergency C02 scrubber.
1 x Emergency Heater.
1 x sound power phone.
1 x speaker bull horn.
1 x call button.
1 x hyperbaric fire extinguisher.
1 x hyperbaric chamber light.
1 x caisson gauge.
Chamber aluminium flooring.
4 x overboard dump mask connection points 2 x manifold block and 1 x tescom back pressure regulator
1 x hyperbaric toilet system.
1 x shower system.
1 x Sink.
1 x Equipment Lock. TUP 1 End manway


Documents available: Copy of Original Build Certificate
Gas and Hydro Certificates and Viewport Certificates