Perhaps that was hyperbole?
Another possible approach might be based on this Kubelwagen tank crew trainer. The fake tank tracks could provide flotation and the only entry was through a roof-top hatch. Slow but stable, unless the pontoons were hydroplane profiled on the bottom with retractable wheels.
https://external-content.duckduckgo....jpg&f=1&nofb=1
The pontoons could be articulated, like the 1971 Russian Venus lander's robot Prop-M to lift the Kubelwagen floorpan clear of the water.
cyberneticzoo.com/walking-machines/1971-prop-m-mars-mini-rover-russian/
Would not that be cool? 
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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