Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus | 
| Gulf of Tonkin  | |
|---|---|
| BT | Pacific Ocean | 
| .North Pacific | |
| ..Northwest Pacific | |
| ...South China Sea | |
| ....Gulf of Tonkin | |
| UF | Tonkin Gulf | 
| RT | Hainan China | 
| SN | Arm of the South China Sea, NE Vietnam. This term has multiple hierarchies. Added to Thesaurus in 1981. |