Environmental Class – Clean
1 General
1.1 Introduction
The additional class notations Clean, Clean(Design), Clean(Tier III) and Clean(Design, Tier III) set requirements for the ship’s design, operation and equipment reducing the environmental impact from emissions to air, and discharges to sea, and deliveries to shore from vessels. The requirements for these additional class notations are in compliance with, or more extensive than those found in international standards currently in force.
1.2 Scope
The scope of the additional class notations Clean, Clean(Design), Clean(Tier III) and Clean(Design, Tier III) is to attain a vessel with controlled environmental standards of design and performance. International recommendations, standards and references have been used as the foundation for the rules, although the rule requirements may be more stringent. When setting the emission and discharge limits, and determining the measuring procedure, due consideration has been given to technical and practical limitations inherent in the design and construction of different types of vessels. Unless a particular edition is explicitly referred to, the latest edition of each standard applies.
1.3 Application
The additional class notations Clean and Clean(Design) apply to vessels complying with the requirements specified in Table 1:
1.4 Class notation and qualifiers
1.4.1 The class notation Clean identifies the basic requirements for controlling and limiting operational emissions and discharges. The requirements are specified in [2].
1.4.2 The class notation Clean with the qualifier Design identifies additional requirements for controlling and limiting operational emissions and discharges. In addition, this qualifier specifies design requirements for protection against accidents and for limiting their consequences. The requirements are specified in [3].
1.4.3 When vessels comply with requirements of either Clean or Clean(Design) class notations, the qualifier Tier III may be assigned for those vessels complying with the NOx emission requirements of Tier III according to MARPOL Annex VI, Regulation 13.
1.5 Definitions
The terms defined in Table 2 are used in this document.
1.5.1 Abbreviations
The abbreviations described in Table 3 are used in this document.
1.6 Procedural requirements
1.6.1 Documentation and certification requirements
1.6.1.1 Documentation shall be submitted as required by Table 5 .
1.6.1.2 For general requirements to documentation, see DNV-CG-0550 Sec.6.
1.6.1.3 For a full definition of the documentation types, see DNV-CG-0550 Sec.5.
1.6.1.4 In addition to marine equipment required to be certified according to statutory requirements in MARPOL, the following certificates given in Table 4 are required for Clean(Design) class notation.
1.6.2 In-service requirements
1.6.2.1 If approved arrangements, equipment or procedures are altered or modified, documentation shall be either resubmitted for approval or acceptance by the attending surveyor at annual surveys.
1.6.2.2 The environmental performance of systems covered by the rules in this section shall be verified by inspection, measurements, and sampling, or by other equivalent means in accordance with the requirements of the rules in this section and in compliance with identified standards and guidelines. Data shall be gathered and kept onboard in appropriate logbooks for review during periodical surveys as defined in Pt.7 Ch.1 Sec.6 [16].
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Source: DNV
