| Abbreviation | Region | Min Lon | Max Lon | Min Lat | Max Lat |
|---|---|---|---|---|---|
| AFC | Africa | 20W | 60E | 35S | 35N |
| CIO | Central Indian Ocean | 55E | 95E | 15S | 15N |
| EPO | Eastern Pacific Ocean | 178W | 120W | 40S | 40N |
| H01 | Southwest Atlantic Ocean (Hole1) | 35W | 15W | 40S | 15S |
| H02 | Mediterranean (Hole2) | 20W | 65E | 30N | 40N |
| H03 | Northeast Atlantic Ocean (Hole3) | 65W | 30W | 25N | 40N |
| H04 | East Atlantic Ocean (Hole4) | 35W | 15W | 15N | 40N |
| H05 | Southwest Indian Ocean (Hole5) | 55E | 85E | 40S | 10S |
| H06 | Southeast Indian Ocean (Hole6) | 80E | 150E | 40S | 25S |
| H07 | Southeast Pacific Ocean (Hole7) | 130W | 85W | 40S | 5S |
| H08 | South of Africa (Hole8) | 20W | 60E | 40S | 30S |
| MSA | Meso-America | 130W | 30W | 10S | 30N |
| SAM | South America | 90W | 30W | 40S | 15N |
| SAS | South Asia | 60E | 100E | 5N | 40N |
| TRA | Tropical Atlantic | 50W | 0 | 20S | 20N |
| USA | United States | 130W | 60W | 20N | 40N |
| WMP | Warm Pool | 80E | 150E | 30S | 40N |
| WPO | Western Pacific Ocean | 145E | 170W | 40S | 40N |