New Study Looks at Impact of Weather on Container Stack Stability (gcaptain.com)
High waves, high claims: New study on container losses (gard.no)
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From the report, not sure what this means:
Another finding we had was that among the vessels that had a stack collapse incident, the share of vessels exposed to such high waves increased by almost 12 times from day 1 to day 7. This suggests that these vessels may not have been able to avoid such heavy weather in spite of the advanced weather routeing tools available.
These two graphics were included:
In my experience the initial weather routing uses just wind speed limits (e.g. 50 kts) and wave height limits (e.g. 6-7 meters), if that’s going to lead to long detours to avoid heavy weather then look at wave direction period and period.
Sometimes having to adjust course and speed for weather can’t be avoided and possibly having to hove-to.
The term “adverse weather” is subjective to seafarers. Often, advice on mitigating the risk is either oversimplified (by recommending avoidance of adverse weather altogether) or overly complicated (by suggesting calculations for resonant, synchronous, and parametric roll risks based largely on estimates). While assessing the influence of weather on a vessel’s motions may seem straightforward in theory, it is much more challenging for seafarers in practice, due to numerous unknowns and estimations.
According to that graphic of the container loss incidents the seas were -
Over 7-9 meters seas a total of 56 % of the time. Over 12.5 meters 21% of the time.
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Surprising ! ?
However, they forgot to sort the raw data by correlation with the moon’s phase or the water temperature.
Does that product have anything to do with weather avoidance?