Maritime history is the study of human activity at sea and covers a broad range of topics related to humankind's relationship with oceans, seas, and waterways. It includes the history of fishing, whaling, maritime law, ships, navigation sciences, trade, and more. There are traditional and utilitarian approaches to studying maritime history, with the traditional focused on academics and the utilitarian aimed at influencing policymakers. A ship captain's primary duty was to the ship's owner, followed by protecting the cargo and caring for the crew.