Clear, in the context of customs and immigration at a seaport, refers to the process of ensuring all legal formalities, including documentation, verification, and compliance with local and international regulations regarding people, goods, and vessels, are fulfilled and approved by the relevant authorities before a ship departs. This inspection and approval procedure is crucial to ensure the legality and safety of maritime travel and transport, avoid illegal activities such as smuggling or human trafficking, and conform to trade, taxation, and immigration policies of the involved countries. This process includes verifying personal identities, inspecting travel documents like visas and passports, checking the cargo for illicit items, ensuring proper declaration and duties payment for imported/exported goods, ensuring the seaworthiness of vessels, among other things. The ship, its crew, and its cargo are allowed to leave the port only after receiving clearance from the customs and immigration authorities.

1. The ship crew had to clear all customs and immigration processes before departing from the harbor, including documenting all goods onboard and verifying the passport details of the crew. 2. The airline had to clear its passengers through immigration and customs before the flight could take off from the international airport, to ensure all legal formalities were addressed. 3. Before embarking on their journey, the container ship's captain was responsible to clear all import-export paperwork with the port's customs authority to comply with international trade laws. 4. A private yacht owner had to clear his vessel through customs by declaring any items bought from the foreign port, and ensuring all passengers had appropriate visa and passport documentation before leaving the harbor. 5. Prior to departure, the courier service had to clear legal formalities related to customs and immigration, such as declaring the value of goods being transported, to avoid any legal risk or delay at the destination port.

Fun Fact: The company CLEAR is revolutionizing the realm of travel and border control. Not only does this service streamline airport security, but it also addresses customs and immigration legalities before leaving port. This means that instead of dealing with the stress of these procedures upon arrival after a long journey, travelers can manage them prior to departure. These services are conducted through biometric identity verification, which includes fingerprint recognition and iris scanning - a case where the realms of technology and travel beautifully intertwine. This esteemed service turns what was once viewed as a tedious process into a breezy voyage, giving travelers the freedom to breathe easy and enjoy their trip!