The aerospace industry includes the engineering and development of aircraft material or parts and engines, as well as the maintenance, engineering and development of aircrafts. The aerospace industry has many world-class companies and developers of related products such as flight simulation, navigation, guidance, control, communication and defense systems. The marine transportation sector covers all operators of marine and port services that work at the national and international level. It can also include companies from other countries that make a port call in Canada, Quebec and the United States, as well as companies working in the manufacturing of boats and the building of vessels, watercraft and related products.