Spatio-temporal variation in sea state parameters along virtual ship route paths

The article presents a study investigating the level of variation in sea state parameters encountered by sailing ships crossing oceans. have been obtained from reanalysis, this case ERA5. is based on use different interpolation schemes to compute geographical positions off fixed grid. It shown that can be significant. Consequently, ships, covering relatively long distances short time (30–60 min), it recommended rely bilinear rather than nearest neighbour. is, fact, at which means normal assumption stationary seaway periods up 3 h likely violated for typical service speed (15–20+ kt).