Definition(s)
Surface Unit
Surface unit is a unit with a ship- or barge-type displacement hull of single or multiple hull construction intended for operation in the floating condition.
Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global Standards
Source: IMO resolution MSC.267(85), International Code on Intact Stability, 2008 (2008 IS Code), 4 December 2008, International Maritime Organization. Regulatory Guidance
Source: IMO Resolution MSC.267(85), adoption of the International Code on Intact Stability, 2008 (2008 IS Code), 4 December 2008, International Maritime Organization. Regulatory Guidance
Surface Type Unit
Surface type unit means a unit with a ship shape or barge type displacement hull of single or multiple hull construction intended for operation in the floating condition.
Source: Mobile Offshore Drilling Units, 46 CFR 107-109 (2013). Regulations