Definition(s)
Special Duties Notation
A notation indicating that the unit has been designed, modified or arranged for special duties other than those implied by the type notation, e.g., oil exploration. Units with special duties notations are not thereby prevented from performing any other duties for which they may be suitable.
Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global Standards