I would be very surprised if the waste heat had any significant impact more than a few meters/yards from the container. Water has a really high heat capacity and the oceans are large.
Almost all the energy that is heating up the ocean is coming from the sun - we've just put a thicker blanket round the earth to trap more heat. Waste heat from human activity is a tiny part of the global energy balance.
Almost all the energy that is heating up the ocean is coming from the sun - we've just put a thicker blanket round the earth to trap more heat. Waste heat from human activity is a tiny part of the global energy balance.