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