Subject
- Inland Waters7
- Fishing6
- Marine resources conservation6
- Coastal mapping5
- Continental shelf5
- Drainage5
- Fisheries5
- Marine biodiversity conservation5
- Rivers5
- Watersheds5
- Beaches4
- Harbors4
- Lakes4
- Marine pollution4
- Outdoor recreation4
- Recreation areas4
- Recreational use4
- Sewage4
- Bodies of water3
- Economic zones (Law of the sea)3