1. The first construction of port navigation mainly involves port, waterway and coastal engineering, and is applicable to the construction, supervision, detection and evaluation of port, waterway and coastal engineering construction projects.
2. The first construction of civil aviation mainly involves civil aviation airports, air traffic control, air transportation and other fields, and is applicable to the construction, operation and management of civil aviation airports, air traffic control, air transportation and other fields. Compared with the pre-construction of port and shipping, the two are more applicable.