A mariner is a person who navigates or operates a ship or boat. Mariners can work in various roles, including captains, crew members, and engineers. They are skilled in handling vessels, understanding maritime laws, and ensuring the safety of passengers and cargo. Mariners often undergo training and certification to gain the necessary skills and knowledge. They may work on different types of watercraft, from small fishing boats to large cargo ships. Their work is essential for trade, transportation, and fishing industries, contributing significantly to the economy and global commerce.