North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 623 - Civil engineering works
- 62313 - Marine engineering works
- 623131 - Seaports and harbours
- 6231311 - Seaports and harbours
- 623132 - Marinas
- 6231321 - Marinas
- 623133 - Canals and waterways
- 6231331 - Canals and waterways
- 623134 - Other marine engineering works
- 6231341 - Other marine engineering works
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