https://www.cnbc.com/2018/07/10/elon-musk-says-his-mini-submarine-can-be-used-for-other-things.html

Elon Musk says his newly made submarine could have worked in the recent rescue mission in Thailand, and he may even deploy it underwater again or in space.

On Tuesday, Musk, who runs Tesla, SpaceX, the Boring Company, among other things, took to Twitter to dispute a claim from a Thai official that the mini-submarine built by SpaceX and Boring Company engineers was impractical for the rescue of several Thai boys from a flooded cave, even though the same official praised the invention.