Section 5 Verification, testing and trials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 23 Additional Requirements for Passenger Ships - Section 5 Verification, testing and trials

Section 5 Verification, testing and trials

Parent topic: Chapter 23 Additional Requirements for Passenger Ships

5.1 General

5.1.1 Activities, including testing and trials, are to be carried out to verify that the services described in Pt 5, Ch 23, 2 Safe return to port and Pt 5, Ch 23, 4 Orderly evacuation and abandonment after a casualty may be provided in the event of fire or flooding to the satisfaction of LR, see Pt 5, Ch 23, 1.1 Scope and application 1.1.5 andPt 5, Ch 23, 1.4 Plans and information 1.4.12. These activities are to include at least those in Pt 5, Ch 23, 5.1 General 5.1.2 and Pt 5, Ch 23, 5.1 General 5.1.3.

5.1.2 System Capability Testing is to be carried out to verify the ability of each essential system to provide capabilities in line with the design criteria. This testing is to be completed during harbour acceptance trials and sea trials, to the satisfaction of LR.

5.1.3 Scenario testing is to be carried out, verifying the ability of all the essential systems to provide the required capabilities under the identified fire and flooding casualties, taking full account of interaction and dependencies between the essential systems. Tests can be performed during harbour acceptance trials; however, certain scenarios will be required to be tested under sea-going conditions, where performance can only be properly verified during trials at sea (e.g. navigational systems, manoeuvrability, etc.). Testing of at least six scenarios is to be completed and is to include at least:

  1. loss of a Main Vertical Zone;

  2. casualty that results in the largest reduction in propulsion power;

  3. casualty that results in the largest reduction in steering capability;

  4. casualty that results in the most manual actions;

  5. casualty with the highest fire risk/load; and

  6. casualty affecting the greater number of essential systems.

Note It is acceptable that scenarios Pt 5, Ch 23, 5.1 General 5.1.3.(b), Pt 5, Ch 23, 5.1 General 5.1.3.(c), Pt 5, Ch 23, 5.1 General 5.1.3.(d), Pt 5, Ch 23, 5.1 General 5.1.3.(e) and Pt 5, Ch 23, 5.1 General 5.1.3.(f)may be covered by the same test if applicable.

5.1.4 The above testing is to verify:

  1. The effect of a specific component failure.

  2. The effectiveness of automatic/manual isolation systems.

  3. The behaviour of any interlocks that may inhibit operation of essential systems.

5.2 Trials

5.2.1 In addition to the requirements for sea trials in Pt 5, Ch 1, 5.2 Sea trials, trials are to be carried out to demonstrate that an acceptable service speed and steering capability for return to port can be achieved in the event of fire or flooding, see Pt 5, Ch 23, 2.1 General 2.1.2, Pt 5, Ch 23, 2.1 General 2.1.2.(b) andPt 5, Ch 23, 5.1 General 5.1.3. The operational envelope(s) under the failure conditions is(are) to be determined.

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