The UK division of Netherlands-based Offshore Ship Designers (OSD), is designing two 120, IMT9120 Riserless Light Well Intervention/IMR vessels for Austin Offshore.
The diesel-electric propulsion vessels are intended to carry out riserless light well intervention, light well intervention, light construction, subsea installation, inspection maintenance and repair of subsea installations. They can deploy three ROVs and have a 250-tonne capacity AHC crane as well as a travelling gantry well intervention tower system.
The 9,500 dwt vessels have accommodation for 140 people. Dimensions are 120m LOA and 30m beam with an operational drafts of 7.5m.
The vessels will be built by China Merchants Industry Holdings, based in Hong Kong, China, under a contract with Singapore-based Upstream