Section 2 Principles
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 3 Additional Class Notations - Part 1 Ship Type Capability - Chapter 5 Replenishment at Sea (RAS) Systems - Section 2 Principles

Section 2 Principles

Parent topic: Chapter 5 Replenishment at Sea (RAS) Systems

2.1 Design and operating principles

2.1.1 RAS systems are to be designed in accordance with user defined operating and performance criteria taking account of the ship type and service operating envelope.

2.1.2 RAS systems are to be capable of operation within specified operating conditions that include maximum sea states, wind conditions and those identified in Vol 2, Pt 1, Ch 3, 4 Operating conditions.

2.1.3 RAS systems are to be designed and installed such that degradation or failure of any RAS system will not render another system inoperable.

2.1.4 RAS systems are to be capable of operating within the normal vibration modes and cyclic loads of the ship.

2.1.5 RAS systems are to be designed to minimise the risks to ship, personnel and the environment. The risks involved in carrying out identified hazardous activities are to be as low as reasonably practicable.

2.2 Lifecycle principles

2.2.1 RAS systems are to be operated and maintained such that the required performance, integrity and dependability can be achieved throughout the life of the ship.

2.2.2 To demonstrate continued compliance with the Provisions of Classification for engineering systems, see Vol 2, Pt 1, Ch 1, 2.1 Provisions 2.1.1, surveys are to be carried out in accordance with the Regulations and as detailed in Vol 3, Pt 1, Ch 5, 14 Survey through life.

2.3 Class notations

2.3.1 Ships complying with the applicable requirements of this Chapter will be eligible for machinery class notations.

RAS(ABV) Ships having arrangements to enable RAS operations astern, abeam and VERTREP.
RAS(AB) Ships having arrangements to enable RAS operations abeam and astern only.
RAS(AV) Ships having arrangements to enable RAS operations astern and VERTREP.
RAS(BV) Ships having arrangements to enable RAS operations abeam and VERTREP.
RAS(A) Ships having arrangements to enable RAS operations astern only.
RAS(B) Ships having arrangements to enable RAS operations abeam only.
RAS(V) Ships having arrangements to enable RAS operations VERTREP only.

2.3.2 Where ships comply with NATO replenishment at sea requirements, the requirements of this Chapter will be eligible for an additional character (NT) following any of the notations described in Vol 3, Pt 1, Ch 5, 2.3 Class notations 2.3.1. The relevant standard(s) (STANAG(s)) for assignment of the (NT) notation are to be specified with reference to the arrangements being applied from Vol 3, Pt 1, Ch 5, 2.3 Class notations 2.3.1. Assessment for compliance with the identified standard will address the safety and design/operating principles in these Rules.

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