The term 'Shipwreck Locator' refers to a job that uses sonar technology to locate shipwrecks. Sonar, which stands for Sound Navigation and Ranging, is a method of detecting objects underwater by using sound waves. This technology is used to detect the presence of shipwrecks, as well as their exact location. The job of a Shipwreck Locator requires the use of specialized equipment and knowledge of sonar technology in order to accurately locate shipwrecks.