Exam Question
With reference Ballast Water Management Systems on merchant ships, explain the following:
(i) System Design Limitations (SDL)
(ii) Treatment Rated Capacity (TRC)
(iii) Failed Vs Invalid Test Cycles.
Class 1 (Chief Engineer)
Engineering Management
📅 Jul 2022
Reference Answer
### (i) System Design Limitations (SDL)
System Design Limitations (SDL) are the operational and water quality parameters that define the boundaries for the correct and effective functioning of a Ballast Water Management System (BWMS). These limitations are determined and verified by the manufacturer during the rigorous land-based and shipboard testing required for Type Approval, as mandated by the IMO's BWM Convention (Regulation D-3) and the BWMS Code.
Operating a BWMS outside its SDLs means the system cannot guarantee compliance with the D-2 discharge standard. The ship's crew must be fully aware of these limitations, which are documented in the BWMS Type Approval Certificate and the ship-specific Ballast Water Management Plan (BWMP).
Key examples of SDLs include:
System Design Limitations (SDL) are the operational and water quality parameters that define the boundaries for the correct and effective functioning of a Ballast Water Management System (BWMS). These limitations are determined and verified by the manufacturer during the rigorous land-based and shipboard testing required for Type Approval, as mandated by the IMO's BWM Convention (Regulation D-3) and the BWMS Code.
Operating a BWMS outside its SDLs means the system cannot guarantee compliance with the D-2 discharge standard. The ship's crew must be fully aware of these limitations, which are documented in the BWMS Type Approval Certificate and the ship-specific Ballast Water Management Plan (BWMP).
Key examples of SDLs include:
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