Not even an underwater drone. A small solar powered drone that stays on the surface could feasibly have a satellite connection to the internet for controlling it. Anything small won't be seen in the ocean anyway or will be disregarded as drifting rubbish.
another use for my idea for an underwater drone that attaches to target ship hulls and drills holes
we need mad science to make these things capable of boring through steel hulls https://en.wikipedia.org/wiki/Teredo_navalis
we're gonna want sailboats in the future to move cargo though, might not want to give up on the "target" part of "target ship hulls"
have you heard the good news about TORBEDO?
may it always find its target
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Not even an underwater drone. A small solar powered drone that stays on the surface could feasibly have a satellite connection to the internet for controlling it. Anything small won't be seen in the ocean anyway or will be disregarded as drifting rubbish.