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Subject
- Navigation136
- Nautical charts26
- Coastal ecology20
- Intracoastal waterways20
- Coasts14
- Harbors10
- Oil and gas leases5
- Offshore oil industry4
- Submarine topography4
- Continental shelf3
- Environmental aspects3
- Geology3
- Maps3
- Offshore oil well drilling3
- Environmental impact statements2
- Gas fields2
- Gulf of Mexico2
- Offshore gas industry2
- Oil fields2
- Petroleum in submerged lands2
