A Km Deep Global Ocean ... Navigable Or Would the Ark Have Floundered?

Exhibit A:

North Sea Lifeboats: How the RNLI saves lives in this treacherous patch of water
RNLI | 21 Aug. 2024
https://www.youtube.com/watch?v=xh382Be0CSU

Takeaway: the North Sea is treacherous and dangerous to boats.

Exhibit B:

For the most part, the sea lies on the European continental shelf with a mean depth of 90 metres (300 ft).

https://en.wikipedia.org/wiki/North_Sea#Major_features

Footnoted:

[1] L.M.A. (1985). "Europe". In University of Chicago (ed.). Encyclopædia Britannica Macropædia. Vol. 18 (Fifteenth ed.). U.S.A.: Encyclopædia Britannica Inc. pp. 832–835. ISBN 978-0-85229-423-9.
[7] Calow, Peter (1999). Blackwell's Concise Encyclopedia of Environmental Management. Blackwell Publishing. ISBN 978-0-632-04951-6. Archived from the original on 17 April 2023. Retrieved 26 December 2008.

Takeaway: the North Sea is far shallower than 1 km on average.

Conclusion:

It's the shallow waters that are dangerous, not the deep ones./HGL