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IR
CAP
Indian Register of Shipping
IR-CAP
Condition Assessment Program
Indian Register of Shipping
IR
CAP
Indian Register of Shipping
The Purpose of this Presentation...
• To help you understand CAP Rating
• To explain the Rating Process
• To help you know the factors that affect the rating
IR
CAP
Indian Register of Shipping
CAP Rating
Independent assessment carried out at the request of ship owner.
One or more aspects, viz. Ship’s Structure, Machinery & Cargo Systems can be assessed – as desired.
The extent of survey is larger than that carried out at ESP or CAS survey and the Report is very detailed.
IR
CAP
Indian Register of Shipping
CAP Rating
Detailed documentary evidence is now available to all interested parties.
Assessment is carried out on as-is-basis, considering all repairs & renewals that have been carried out during the CAP survey
They can now judge the condition of vessel better & have better confidence on her ability to provide good service without any repairs in the near future.
Insurers Ship Charters
Cargo Shippers Terminal Operators
IR
CAP
Indian Register of Shipping
•CAP 1: no deficiencies and/or only superficial reductions from as new or current rule scantlings
•CAP 2: deficiencies of a minor nature not requiring correction or repairs and/or scantlings significantly above class renewal limits
CAP Rating
After the assessment a CAP rating is assigned to the ship on a scale of 1- 4
•CAP 3: deficiencies which do not require immediate corrective action, and / or hull scantlings, although generally above class renewal levels, are with substantial corrosion
•CAP 4: deficiencies which affect the ship’s potential to remain in class, and / or scantlings at or below the class renewal levels
IR
CAP
Indian Register of Shipping
Benefits to Ship Owner…
The CAP survey also provides the ship owner, a basis to plan the maintenance that ensures continued asset utilization.
The Ship owner can obtain better charters by demonstrating better quality of his ships.
IR
CAP
Indian Register of Shipping
CAP Rating Process - Hull
IR
CAP
Indian Register of Shipping
CAP Rating Process - Hull
Local Strength Rating
Longitudinal Strength Rating
Total Hull Rating
Satisfactory survey of Hull Fittings
Anchor, Cable, Windlass, Rudder & Steering Gear, Weather-tightness, Shipside valvesTank Testing is a pre-requisite !
and
IR
CAP
Indian Register of Shipping
CAP Rating Process - Hull
Thickness measurement readings greatly influence Local Strength Rating
A rating could be derived by assessing the TM readings statistically, for a local structure
A rating could be derived by systematically evaluating each significant structural panel and identifying the weakest panel
or
IR
CAP
Indian Register of Shipping
It is all too well known that the chain is as strong as it’s weakest link,
so it is in the ship structure
IR
CAP
Indian Register of Shipping
CAP Rating Process - Hull
A rating derived by identifying the weakest link would be therefore more precise, and a better indicator
Although such an assessment is more difficult to accomplish and time consuming
IR-CAP utlises this concept to derive local strength rating
IR
CAP
Indian Register of Shipping
Local Strength Rating Process
Ship
A Compartment
Compartments in Cargo region + APT & FPT
The Compartment Boundaries
Structural Panels
Plating + Secondary Stiffeners + Primary Girders
Rating process starts at Panel Level
IR
CAP
Indian Register of Shipping
Local Strength Rating Process
IR
CAP
Indian Register of Shipping
Local Strength Rating ProcessBesides TM readings the assessment also considers internal / external examination and test results
That is condition of the structure including coating condition also influences the rating
Thus the compartment rating is derived considering TM readings and observed condition of the compartment
IR
CAP
Indian Register of Shipping
Local Strength Rating Process
Dry-dock External Examination
Internal Examination
Local Strength Rating of Each Panel
Overall survey
Close-up survey
Thickness Measurements
IR
CAP
Indian Register of Shipping
4 Attributes that are reported from External and Internal Examinations
General condition Buckling, Indentations, Cracks
These attributes are considered together with the Thickness Measurement to rate each panel
Wastage Pitting, Localized thinning
Coating condition Good, Fair or Poor
Anode condition Good, Adequate, In-adequate
IR
CAP
Indian Register of Shipping
Longitudinal Strength Rating
Evaluation is carried out by using a specially developed software that computes available Longitudinal Strength, at various sections in the cargo region
Available Strength is then compared with that required at the location.
IR
CAP
Indian Register of Shipping
Longitudinal Strength Rating
The software also helps evaluation of various repair options to improve the longitudinal strength, where required, in an optimum way.
Longitudinal Strength Rating for the Vessel = the poorest rating obtained.
IR
CAP
Indian Register of Shipping
Total Hull Rating - Computation
Total Hull Rating
Rating of each Individual Compt.
Weighted Average
Compt. Boundaries
Rating of Panels in Boundary Surface
Overall Rating (Longl Strength)
Minimum over the entire Cargo Length
Longitudinal Strength evaluation at various sections
Overall Rating(Local Structures)
IR
CAP
Indian Register of Shipping
CAP Rating
Machinery / Cargo Systems
IR
CAP
Indian Register of Shipping
CAP Rating – Machinery / Cargo Systems
Overall Survey
Functional Test
Predictive Test
Audit of Maintenance
Practices
Machinery Rating
Maintenance Rating
Total Machinery
Rating
IR
CAP
Indian Register of Shipping
Machinery job cards
To carry out the Machinery CAP survey ‘Job Cards’ are prepared for each ship
Ship’s Machinery is systematically arranged in logical functional system groups such as ‘Propulsion System’, etc.
For each machinery in each system, attributes to be examined are identified and listed down in the job cards.
IR
CAP
Indian Register of Shipping
1 2 3 4 NAENGINES DRIVING GENERATORSPort Aux. Engine including Attachments & Coolers
Crank Case and Casing Doors including Relief DevicesCylinder Heads and valvesEntablatureBed Plates, Ties and Holding Down Bolts and ChocksExternal leakages of flammable fluidsOther external leakagesScavenges/Supercharger Pumps/BlowersAir CoolersPiston and Piston RingsCylinder LinersCrank BearingsMain BearingsCamshaft Bearings, Shafts and Cams
Rept No: CAP/15550/09/04MA CHINERY INSTALLATION RATING
Vessel : Jag Padma (I.R. No. : 15550)
6Job Cards are prepared by grouping the machinery into well defined systems - Propulsion System etc.
Machinery job cards
Note the detailed list of components for each machinery unit, for which information is reported These job cards prepared by H.O. for each ship, and are filled up by the surveyor performing the survey
IR
CAP
Indian Register of Shipping
Overall Survey / Function Test
Each machine is examined as per the items identified on the Job- cards
Function test of each machinery is witnessed and it’s current capability assessed
IR
CAP
Indian Register of Shipping
Overall Survey / Function Test
Overall Survey
•Examination of each machine component for any deterioration, corrosion, wear etc.
•Verify the condition of instrumentation, and
•Note presence of any leakages, etc.
IR
CAP
Indian Register of Shipping
Overall Survey / Function Test
Functional Testing
• To verify that the intended function of the machinery is being performed satisfactorily
• Verify the Operational Parameters / Measure the output and
• Verify the functioning of safety devices
IR
CAP
Indian Register of Shipping
Predictive Testing
All machinery is subjected to predictive testing, as applicable, to ensure no hidden defects exist
Depending on the machinery one or more of the following tests employed:
•Vibration measurements
•Used oil analysis
•IR ( Insulation Resistance) Measurement
IR
CAP
Indian Register of Shipping
Measured vibration levels are compared against acceptable levels and ratings assigned.
Acceptable levels adopted are derived from ISO Std. 7919, and from our past experience.
Vibration Measurements :
IR
CAP
Indian Register of Shipping
Audit of Maintenance Practices
The audit verifies that:
Maintenance routines are as per manufacturer’s recommendations and good engineering practice
Maintenance routines are carried out as per schedule and records maintained
A good system of Inventory Control for spares and stores exists for maintenance activity
IR
CAP
Indian Register of Shipping
Total Machinery Rating - Computation
Total Machinery Rating
Rating of each Individual Syst.
Weighted Average
Mach. Attributes + Predictive Testing
Rating of Machinery Items
Overall Rating (Maintenance)
Minimum over all the Systems
Audit of maintenance practice for each machinery
Overall Rating(Machinery Current
Status)
IR
CAP
Indian Register of Shipping
In Summary…
IR- CAP is a comprehensive scheme for assessment of Tankers
The implementation of the scheme is also as disciplined
Well Accepted by our clients as a Value Adding Service
Another example of Quality Service from IRS
IR
CAP
Indian Register of Shipping
Thank you !
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