Surveys & Survey report under condition assessment scheme ( CAS )

CAS SURVEY / SURVEY REPORT / Extent of the Survey

 Following  surveys come under the condition assessment scheme ( CAS )

 

1. Overall Survey

An overall survey of all spaces set out in Scope of CAS shall be carried out which 

includes surveys of the hull structure in way of cargo tanks, pump rooms, cofferdams, pipe 

tunnels, void spaces within the cargo area and all ballast tanks.

2. Close-up survey

  A.  All web frame rings, in all ballast tanks (Complete transverse web frame ring including 

      adjacent structural members. )

  B. All web frame rings, in a cargo wing tank (Complete transverse bulkhead, including girder

      and stiffener systems and adjacent members. )

 C. A minimum of 30% of all web frame rings, in each remaining cargo wing tank (Complete 

     transverse web frame ring including adjacent structural members. ) 

D. All transverse bulkheads, in all cargo and ballast tanks (Complete transverse bulkhead, 

    including girder and stiffener systems and adjacent members.) 

E. A minimum of 30% of deck and bottom transverses including adjacent structural members,

    in each cargo centre tank. 

F. Additional complete transverse web frame rings or deck and bottom transverse including

    adjacent structural members as considered necessary by the attending surveyor.

3. Thickness Measurement

A. Within the cargo area:

• Each deck plate
• Three transverse sections
• Each bottom plate

  Thickness Measurement inside a Tank 

B. Measurements of structural members subject to close-up survey according for general 

    assessment and recording of corrosion pattern. 

C. Suspect area. 

D. Selected wind and water strakes outside the cargo area. 

E. All wind and water strakes within the cargo area. 

F. Internal structure in the fore and aft peak tank. 

G. All exposed main deck plates outside the cargo area and all exposed first tier superstructure deck plates

Survey Report

A survey report shall be completed for the CAS survey. The report shall indicate the date, 

location (place), and where relevant, whether or not the CAS survey was carried out in 

drydock afloat or at sea. When the CAS survey is split between different survey stations, a 

report shall be made for each portion of the CAS survey.

Survey records relating to the CAS survey, including actions taken, shall form an auditable 

documentary trail.

Extent of the Survey

1. identification of the spaces where an overall survey has been carried out;
2. identification of location, in each space, where a close-up survey has been carried out, together with the means of access used; and
3. identification of the spaces, and locations in each space, where thickness measurements have been carried out; and

Results of the Survey

1. extent and condition of coating in each space. Identification of spaces fitted with anodes and the overall condition of the anodes;
2. structural condition reporting for each space, which shall include information on the following, as applicable:

• corrosion (location and type of corrosion such as grooving, pitting, etc.);
• cracks (location, description and extent);
• buckling (location, description and extent);
• indents (location, description and extent); and
• areas of substantial corrosion; and

Condition Assessment Scheme ( CAS )

 

The Condition Assessment Scheme (CAS) as a mandatory requirement under the revised regulation     13G of Annex I to MARPOL 73/78 enter into force on 1st September 2002.

 

 CAS apply to

1. oil tankers of 5,000 tons deadweight and above and of 15 years and over after date of delivery of the ship, in accordance with regulation 13G(6);
2. oil tankers subject to the provisions of regulation 13G(7), where authorization is requested for continued service beyond the anniversary of the date of delivery of the ship in 2010; and
3. oil tankers of 5,000 tons deadweight and above and of 15 years and over after date of delivery of the ship, carrying crude oil as cargo having a density at 15oC higher than 900 kg/m3 but lower than 945 kg/m3 , in accordance with regulation 13H(6)(a).”

Contents of the revised MARPOL Annex I

Reg. 13G(6)

A Category 2 or 3 oil tanker of 15 years and over after the date of its delivery shall comply with the Condition Assessment Scheme adopted by the Marine Environment Protection Committee by resolution MEPC.94(46), as may be amended, provided that such amendments shall be adopted, brought into force and take effect in accordance with the provisions of article 16 of the present Convention relating to amendment procedures applicable to an appendix to an Annex.

Reg. 13(G)(7)

The Administration may allow continued operation of a Category 2 or 3 oil tanker beyond the date specified in paragraph (4) of this regulation, if satisfactory results of the Condition Assessment Scheme warrant that, in the opinion of the Administration, the ship is fit to continue such
operation, provided that the operation shall not go beyond the anniversary of the date of delivery of the ship in 2015 or the date on which the ship reaches 25 years after the date of its delivery, whichever is the earlier date.

Reg. 13H (6)(a)

The Administration may allow continued operation of an oil tanker of 5,000 tons deadweight and above, carrying crude oil having a density at 15ºC higher than 900 kg/m3 but lower than 945 kg/m3 , beyond the date specified in paragraph (4)(a) of this regulation, if satisfactory results
of the Condition Assessment Scheme referred to in regulation 13G(6) warrant that, in the opinion of the Administration, the ship is fit to continue such operation, having regard to the size, age, operational area and structural conditions of the ship and provided that the
operation shall not go beyond the date on which the ship reaches 25 years after the date of its delivery

 

Scope of the CAS

The CAS shall apply to surveys of the hull structure in way of cargo tanks, pump rooms, cofferdams, pipe tunnels, void spaces within the cargo area and all ballast tanks.

Relative to ESP, CAS is unique in two respects:

• CAS contains very specific responsibilities and deadlines for planning the survey, which must begin 8 months in advance of the survey’s commencement; and
• The flag Administration must review/monitor the survey and reporting process and issue the five-year full term CAS Statement of Compliance).

CAS Survey Timing

1. The CAS survey shall be aligned to the Enhanced Programme of Inspection.
2. The first CAS survey in accordance with regulation 13G(6) shall be carried out concurrent with the first scheduled intermediate or renewal survey after 5 April 2005, or when the ship reaches the 15 years of age, whichever occurs later.
3. The first CAS survey in accordance with regulation 13G(7) shall be carried out concurrent with the scheduled intermediate or renewal survey due prior to the anniversary of the date of delivery of the ship in 2010.
4. The first CAS survey in accordance with regulation 13H(6)(a) shall be carried out concurrent with the first scheduled intermediate or renewal survey after 5 April 2005.
5. In the case where the Statement of Compliance issued following the first CAS survey under 5.3.2 is valid beyond the anniversary of the date of delivery of the ship in 2010, that CAS may be treated as the first CAS carried out in compliance with regulation 13G(7).
6. Any subsequent CAS survey, required for the renewal of the Statement of Compliance, shall be carried out at intervals not exceeding 5 years and 6 months.
7. Not withstanding the above, the Company may, with the agreement of the Administration, opt to carry out the CAS survey at a date earlier than the due date of the survey referred to above, provided that all the requirements of the CAS are complied with.