6054 x 4041 px | 51,3 x 34,2 cm | 20,2 x 13,5 inches | 300dpi
Data acquisizione:
17 febbraio 2018
Ubicazione:
76 Regent Quay, Aberdeen AB11 5AR, UK
Altre informazioni:
he SEVEN ATLANTIC, delivered by IHC Merwede in 2009 to Subsea 7, is one of the largest and most capable diving support vessels in the world. The 24-person saturation diving system includes four 3-man twin lock living chambers, two 6-man twin lock decompression chambers and two horizontal transfer under pressure chambers (chambers are 2.4m internal diameter). The system is designed to comply with Norwegian NORSOK requirements, and features much improved living conditions compared to previous systems. The diving system can be divided at the centreline to allow for two crews working at different depths. From their living quarters, on-shift divers can access either of two saturation dive bells through two large transfer-underpressure chambers without disturbing the off-shift divers.The diving bells have 7m3 internal capacity and are launched through two athwartshipsmoonpools, positioned near the minimum motion point of the vessel. A comprehensive system of mechanical handling aids is fitted to support saturation and air diving operations, including port and starboard T bars, A-frames, hose reels, tugger winches and umbilical management hoop booms (20m reach from ship side). Two hyperbaric lifeboats are provided (one port and one starboard). The divers breathe a helium-oxygen mixture for the entire work shift – up to 2-3 weeks. Below the diving installation is a huge storage area for pressure vessels with helium/oxygen mixture. Some of the oxygen bottles are stored on deck for fire safety reasons. As helium is a costly gas, it is carefully retrieved from the divers’ exhaled air and recycled back to storage. Length, oa: 144.79m, Length, bp: 128.96m, Breadth, mld: 26.00m, Depth to main deck: 12.00m, Draught design: 7.00m, Deadweight: 8700dwt, Trial speed: 13.6 knots, Occupants: 150 persons.
