CLASSIFICATION AFTER CONSTRUCTION

Revision of 18 July 2024

PURPOSE

Purpose

The purpose of the present procedure is to establish , as far as the LPOs are concerned, the process dealing with the receipt and the review of the drawings for vessels classed after construction (CAC).

Ships previously classed with iacs society (compliant ships)

C AC Type

CAC Type A, B, C and D.

Documents to be submitted

  1. Main plans:

    • General arrangement

    • Capacity plan

    • Hydrostatic curves

    • Loading manual, where required

    • Damage stability calculation, where required.

  2. Hull structure plans:

    • Midship section

    • Scantling plan

    • Decks

    • Shell expansion

    • Trransverse bulkheads

    • Rudder and rudder stock

    • Hatch covers

    • For ship assigned with the additional service feature   CSR, plans showing, for each structural element, both as-built and renewal thicknesses and any thickness for "voluntary addition".

  3. Machinery plans:

    • Machinery arrangement

    • Intermediate, thrust and screw shafts

    • Propeller

    • Main engines, propulsion gears and clutch systems (or Manufacturer's make, model and rating information)

    • For steam turbine ships, main boilers, superheaters and economisers (or Manufacturer's make, model and rating information) and steam piping

    • Bilge and ballast piping diagram

    • Wiring diagram

    • Steering gear system piping and arrangements and steering gear Manufacturer's make and model information

    • Torsion vibration calculations, for ships less than two years old

    • Plans for flexible couplings and/or torque limiting shafting devices in the propulsion line shafting (or Manufacturer's make, model and rating information), for ships assigned with one of the ice class additional class notations .

    • Pumping arrangements at the forward and after ends, drainage of cofferdams and pump rooms and general arrangements of cargo piping in tanks and on decks, for oil tankers.

  4. Plans required for ships assigned one of the additional class notations for Automated Machinery Systems:

    • Instrument list

    • Fire alarm system

    • Plans for systematic maintenance and functioning tests.

  5. Additional documents required for approval of alternative design and arrangements.

  6. Document(s) of approval of alternative design and arrangements are to be submitted, if any.

  7. Structural fire protection and fire control plan.

Specific clarifications

  1. Alternative technical data may be accepted by the Society in lieu of specific items of the listed documentation not available at the time of the transfer of class.

  2. For ships of less than 100 gross tonnage, special consideration will be given to the scope of surveys and documentation to be supplied.

Process of receiving and filing the documents

Above drawings are received and filed in the appropriate tool by the CD in charge (see § 1.2.1 of the related procedure). They are not reviewed.

Ships not previously classed with an IACS Society ( non compliant)

CAC Type

CAC Type E

Documents to be submitted

Documents to be submitted to the Society are not to be less than the following

  1. Main plans:

    • General arrangement

    • Capacity plan

    • Loading cases, calculations of still water bending moments, and relevant documents, particulars of loading calculator and instruction booklet as per Society's requirements, according to the case

    • Stability documents, if applicable.

  2. Hull structure plans

    • Midship section

    • Profile and deck plan

    • Watertight bulkheads

    • Rudder and rudder stock

    • Shell expansion

    • Hatch covers

    • Stern frame.

  3. Machinery plans:

    • Engine room general arrangement

    • Diagram of fuel- (transfer, service), bilge-, ballast-, lubricating oil-, cooling-, steam- and feed-, general service and starting compressed air piping

    • Diagram of fire-fighting systems

    • Drawings of boilers and air receivers

    • Drawings of shaft line, reduction gear and propeller

    • Drawings of steering gear

    • Torsion vibration calculations. Such documents are required only for ships less than 2 years old or for older ships the propelling system of which has been modified during the two years preceding the classification.

  4. Electrical installation plans:

    • Master plan of power distribution, lighting and emergency power circuits

    • Single line diagram of networks and switchboards

    • Location and arrangement of electrical equipment in hazardous areas.

  5. SSructural fire protection and fire control plan.

specific clarifications

  1. Alternative technical data may be accepted by the Society in lieu of specific items of the listed documentation not available at the time of the transfer of class.

  2. Where appropriate within reasonable limits, a proven service record of satisfactory performance during a period of adequate length may be used as a criterion of equivalence. Special consideration will be given to ships of recent construction

  3. For installations or equipment covered by additional service and/or class notations, the Society will determine the documentation to be submitted.

  4. The Society may base its judgement upon documentation such as certificates issued or accepted by the former Classification Society, if any, and statutory certificates issued by the flag Administration or by a recognised organisation on its behalf; moreover, other documents and/or plans may be specifically required to be supplied to the Society in individual cases.

process of receiving documents

  1. Above drawings needs to be reviewed. They are received and uploaded in the appropriate tool by the CD in charge (see § 1.2.1 of the related procedure). The CD will inform the LPO in charge to carry out the review.

Drawing review

  1. Scope : In the general principle, drawings are reviewed within the scope of the Rules applicable at the date of the review

  2. Reviewed drawings of existing ships classed after construction are never stamped nor signed.