[dweymouth]

But in this case with slow speed, it's the massive (literally) amount of mass of the cargo ship that gives it an un-intuitively large amount of energy.

[trilbyglens]

8kn isn't super slow

[rtkwe]

It's 10 mph which is pretty slow as speeds go.

[lupire]

sqrt of 100K times weight of a car is 300 cars worth.