References
Hydrographic Data Codes
| Body of Water | IHO 23-4th | IHO 23-3rd | ACIC M 49-1 | DIAM 65-18 |
|---|---|---|---|---|
| Arctic Ocean | 9 | 17 | A | 5A |
| Atlantic Ocean | - | - | - | - |
| Baltic Sea | 2 | 1 | B26 | 7B |
| Eastern Mediterranean | 3.1.2 | 28 B | - | 8E |
| Indian Ocean | 5 | 45 | F | 6A |
| Mediterranean Sea | 3.1 | 28 | B11 | - |
| North Atlantic Ocean | 1 | 23 | B | 1A |
| North Pacific Ocean | 7 | 57 | D | 3A |
| Pacific Ocean | - | - | - | - |
| South Atlantic Ocean | 4 | 32 | C | 2A |
| South China and Eastern Archipelagic Seas | 6 | 49, 48 | D18 plus others | 3U plus others |
| South Pacific Ocean | 8 | 61 | E | 4A |
| Western Mediterranean | 3.1.1 | 28 A | - | 8W |