A patrol craft is a small, fast vessel designed for security and monitoring in coastal waters. Synonyms for this term include coastal patrol vessel, surveillance craft, coastal defense ship, and coastal surveillance boat. Other similar terms include patrol boat, coast guard vessel, and security boat. These synonyms are often used interchangeably, as they all refer to vessels that play a vital role in securing the waters and protecting against illegal activities such as smuggling and piracy. Regardless of the specific term used, patrol craft are an essential component of coastal security operations, providing a rapid and agile response to threats in the maritime domain.