“Offshore unit” means any fixed or floating offshore installation or structure engaged in gas or oil exploration, exploitation or production activities, or loading or unloading of oil.
Source: International Convention on Oil Pollution Preparedness, Response and Co-operation, 1990. Legislation
Offshore unit means a unit engaged in offshore operations including drilling, oil production, accommodation and other support functions and which generally operates within the territorial waters of a flag state, but excluding the ship types defined in Part 4 of the Rules for Ships.
Source: Rules and Regulations for the Classification of Mobile Offshore Units, Part 1, Regulations, June 2013, Lloyd’s Register, Global Standards