Definition(s)
Maximum Ahead Service Speed
Maximum ahead service speed is the greatest speed which the unit is designed to maintain in service at sea at its deepest seagoing draught.
Source: IMO Resolution A.1023(26), Code for the Construction and Equipment of Mobile Offshore Drilling Units (2009 MODU Code), 2009. Global Standards
Maximum Ahead Service Speed
Maximum ahead service speed is the greatest speed which the ship is designed to maintain in service at sea at the deepest sea-going draught. <Chapter II-1, regulation 3>.
Source: IMO Resolution MSC.216(82), amendments to the International Convention for the Safety of Life at Sea, 1974, as amended, 8 December 2006, International Maritime Organization. Legislation
Maximum Ahead Service Speed
Maximum ahead service speed means the maximum service speed which the unit is designed to maintain, at the summer load waterline at maximum propeller RPM and corresponding engine MCR.
Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 5, Main and Auxiliary Machinery, June 2013, Lloyd’s Register, Global Standards