Section 1 General

1.1.1 The requirements of this Chapter apply to accommodation and offshore support units as defined in Pt 1, Ch 2, 2 Definitions, character of classification and class notations whose primary function is to provide support services to offshore installations. Self-elevating accommodation units which are unmanned in transit conditions need not comply with Pt 3, Ch 4, 3 Bilge systems and cross-flooding arrangements for accommodation units.

1.1.2 The requirements in this Chapter are supplementary to those given in the relevant Parts of the Rules.

1.1.4 Support vessels which have a diving complex on board are to have the diving installation approved in accordance with LR’s Rules and Regulations for the Construction & Classification of Submersibles & Diving Systems, July 2022 or an acceptable standard.

1.1.5 When accommodation units are to operate for prolonged periods adjacent to live offshore hydrocarbon exploration or production installations, it is the responsibility of the Owner/Operator to comply with the relevant regulations of the National Administrations in the country of registration and/or the area of operation, as applicable. Special consideration will be given to the safety requirements for classification purposes, see Pt 1, Ch 2 Classification Regulations.

1.2.1 The Regulations for classification and the assignment of class notations are given in Pt 1, Ch 2 Classification Regulations, to which reference should be made.

1.2.2 Class notations for fire-fighting units are to be in accordance with Pt 3, Ch 5 Fire-fighting Units.

1.2.4 Units engaged in more than one function may be assigned a combination of class type notations at the discretion of the Classification Committee.

1.2.5 Support units engaged in more than two functions may be assigned the type notation multi-purpose support unit.

1.2.6 Lifting appliances are to comply with LR’s Code for Lifting Appliances in a Marine Environment, see also Pt 3, Ch 11 Lifting Appliances and Support Arrangements.

1.2.7 Where the lifting appliances form an essential feature of a classed unit, the special feature class notation LA or will be assigned, see Pt 3, Ch 11 Lifting Appliances and Support Arrangements.

1.2.8 Other special features class notations associated with lifting appliances may be assigned, see Pt 3, Ch 11 Lifting Appliances and Support Arrangements.

1.4.1 Living quarters, lifeboats and other evacuation equipment are to be located in non-hazardous areas.

1.4.2 The requirements for fire safety are to be in accordance with the requirements of a National Administration, see Pt 1, Ch 2, 2 Definitions, character of classification and class notations and Pt 7, Ch 3 Fire Safety.

1.4.3 Additional requirements for safety and communication systems are given in Pt 7 Safety Systems, Hazardous Areas and Fire.

1.5.1 Plans, calculations and data are to be submitted as required by the relevant Parts of the Rules together with the additional plans and information listed in this Chapter.