Canadian Chart 1 Symbols, Abbreviations and Terms
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Offshore Installations - Section L
Underwater Installations
| Ref. | IHO Symbology | Description | CHS Symbology |
| 20 |  |
Submerged production well, depth known, depth unknown |  |
| 21.1 |  |
Suspended well, depth over wellhead unknown |  |
| 21.2 |  |
Suspended well, with depth over wellhead |  |
| 22 | Site of cleared platform |  |
|
| 23 |  |
Above-water wellheads (lit or unlit) |  |
| 24 |  |
Underwater turbine |  |
 |
Current farm, turbine field |  |
|
 |
Current farm, Turbine field with restricted area |  |
|
| 25 |  |
subsurface Ocean Data Acquisition System (ODAS) |  |
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