Sea Salvage Aid is a job that involves using sonar to locate and recover objects from the sea. Sonar is an acronym for Sound Navigation and Ranging, which is a technology used to detect objects underwater by sending sound waves and measuring their return time and strength. This job requires a person to be knowledgeable in the use of sonar and other related technologies to locate and recover objects from the sea. The job also requires the person to have a good understanding of the ocean environment and the safety protocols associated with working in the water.