It seems like people are always overestimating the power consumed by this type of datacenter load, and under estimating the thermal power of transportation. This little tube uses 1/4 of a MW. A nuclear submarine has a roughly 50MW(t) reactor, and there are dozens of those prowling around all of the time.

A really huge datacenter might draw 500MW, but that's only the same thermal output as about 7 airliners.

You could submerge every datacenter on earth and no fish is going to notice.