Abstract: A marine subsea data vessel includes a plurality of server boards, in certain embodiments forming a carousel, coupled with a heat exchanger. The heat exchanger operates to extract heat and transfer the heat to seawater entirely surrounding the marine subsea data vessel. The heat transfer may be through the outer shell of the vessel, or via an external heat exchanger, or both. Various heat exchanger configurations provide additional heat transfer efficiency. The subsea data vessel may be clustered providing additional advantages. The subsea data vessel may be powered via a variety of power sources.