Author(s): Shotaro Uto; Natsuhiko Otsuka
Linked Author(s):
Keywords: Rctic shipping route; Navigability; Operational capability assessment; Speed-power relation; Ice chart; Satellite AIS
Abstract: Arctic sea ice has been rapidly decreasing, and commercial use of the Arctic shipping routes has been expanding in recent years. However, sea ice remains a serious hazard for Arctic navigation. To ensure safe navigation and sustainable use of the Arctic shipping routes, it is necessary to assess the navigability of ships in ice waters from two technical perspectives: structural safety and operational capability which are determined by the hull form and machinery. The International Maritime Organization (IMO) proposed the guidance on methodologies for assessing operational capabilities and limitations in ice. The guidance includes the Polar Operational Limit Assessment Risk Indexing System (POLARIS), which provides operational limits based on the World Meteorological Organization (WMO) sea ice nomenclature and ice classes. The authors developed a method for predicting speed and power in an ice regime using ice chart information. The authors propose an extended framework of POLARIS that includes an operational capability assessment function based on the ship’s speed-power relationship. In this study, a validation study is performed by comparing the predicted speed with the satellite Automatic Identification System (AIS) speed, demonstrating the relevance of the current speed and power prediction method in the comprehensive assessment of ship navigability in the Arctic shipping routes
Year: 2024