This Article will focus primarily on the government entities (e.g., Coast Guard and NTSB) responsible for conducting marine casualty investigations. These formal investigations allow evidence to be gathered and preserved in a more orderly manner than can be done during, or even immediately after, a serious collision, fire, oil discharge, sinking, or other casualty, when response is the primary goal and the “Incident Command Center,” whether run solely by the Coast Guard or in conjunction with other federal and state agencies, is still in full swing.