I am always annoyed when information about interesting engineering projects is cluttered with overly complicated (but beautiful) imperial units. It's a guarantee to make an article look shallow and trivialised.
Here's a very simple example why Metric is better:
Length: 1m
Draught: 1.5 cubic meters
Density of salt water is a bit over 1.0
How heavy can the Undaughted get untill it sinks?
Easy to answer in metric, since 1.5 cubic meters equal to 1500 kg of water.
Looking at the weight: 544kg unladen, or 816kg laden, means it is about half as dense overall as it's draught in water.
Everybody can do that calculation while reading the article in a second, and these conversions get second nature soon. Impossible with imperial.
The largest ship, the Pioneering Spirit, displaces 932,000 tonnes [2].
The Pioneering Spirit is over a million times larger than the Undaunted.
I have been unable to determine how their nutella reserves compare.
[1] https://littleboatproject.org/specs/
[2] https://www.deltamarin.com/references/pioneering-spirit-piet...