There are multiple reasons for carrying out accident investigations, but the primary reason is often a need to gain a deeper understanding of the course of the events from both a human and technical perspective. From this analysis, conclusions can be made that may result in recommendations for decreasing the risk of a similar accidents occurring.
Legislation on the Energy Efficiency Design Index (EEDI) requires the determination of a “weather factor” – fw – reflecting the percentage of its calm-water speed that a ship can maintain in Beaufort 6 and corresponding waves. The higher the fw value, the smaller the speed loss and the better the ship will perform in a seaway. But how do we determine this unknown fw factor, and how do we strike a balance between accuracy and costs?