| NOS | NIMA | |
IHO |
|---|---|---|---|
 |
 |
Submerged production well |
 |
 |
 |
Suspended well, depth over wellhead unknown |
 |
 |
 |
Suspended well, with depth over wellhead |
 |
| Wellhead with depth above the bottom |
 |
||
| Site of cleared platform |
 |
||
 |
Above-water wellheads |
 |
|