How do customs officer understand the concept of arrival and departure at international airport and sea ports?

Customs officers at international airports and sea ports understand the concept of arrival and departure through a combination of physical inspections, documentation checks, and electronic monitoring systems.

When a person or goods arrive at an international airport or sea port, customs officers will typically conduct physical inspections to ensure that they comply with import regulations and do not pose a threat to national security. This may involve checking luggage, conducting interviews, and using specialized equipment such as X-ray machines or drug-sniffing dogs.

In addition to physical inspections, customs officers will also review documentation such as passports, visas, and customs declarations to verify the identity of travelers and the contents of their luggage. Electronic monitoring systems, such as passenger manifests and cargo tracking systems, may also be used to track the movement of people and goods in and out of the country.

On the other hand, when a person or goods depart from an international airport or sea port, customs officers will again conduct physical inspections and document checks to ensure that they comply with export regulations and do not contain prohibited items. Electronic monitoring systems may also be used to track the movement of people and goods leaving the country.

Overall, customs officers at international airports and sea ports have a thorough understanding of the concepts of arrival and departure, and use a combination of physical inspections, documentation checks, and electronic monitoring systems to enforce import and export regulations and ensure the safety and security of their country.