Fundamental Study of Navigation Simulation on the Northern Sea Route During the Sea Ice Decrease Period

As a fundamental of the navigation simulation to understand the passage possibility through the Northern Sea Route (NSR), the navigation simulation is performed during the sea ice decrease period (2007 to 2011) with the sea ice concentration reanalysis. Under even the strictest sea ice condition, the continuous passage period through the NSR is from the last of August to the beginning of September in each year during 2009 to 2011. The NSR passage period in each year is irregular. The simulation in this study can evaluate whether ships can pass through the NSR and escort ships are needed.