New standard by the Norwegian Bellona Foundation
Hull performance monitoring is difficult because many other factors influence fuel consumption and change rapidly: draft, trim, ship speed, seaway, wind, etc. In order to single out the influence of hull roughness, the contributions from all of the significant factors must be estimated, in order to convert data at different conditions to a common baseline.
All hull performance monitoring systems have a similar basic approach: raw data acquired on board are filtered and corrected for external influences. The corrections are based on hydrodynamic models which differ in sophistication, accuracy and required effort. At present, the available approaches are difficult to compare.
The Norwegian Bellona Foundation has initiated the development of the ISO 19030 as a new standard for “Measurement of changes in hull and propeller performance”. This standard complements ISO 15016 (for sea trials) focussing on in-service monitoring. ISO 19030 uses a 3-tiered approach, reflecting different levels of accuracy, thereby increasing the general applicability of the standard. At the lowest tier, noon reports are used, at the highest tier, continuous monitoring systems with automatic data collection.
The evolving ISO 19030 was debated in the 2nd ISO 19030 meeting in Tokyo, 13-15 November 2013. It is expected that several further meetings will be necessary before we actually see the standard in force. “This is a process that will take time and commitment from performance monitoring technology providers, classification societies, ship paint and propeller manufacturers as well as ship owners. We believe that this process alone may lead to improvements”, said Svend Soeyland, Senior Adviser with the Bellona Foundation and convenor for the ISO 19030.
Source: DNV GL
