| NOS | NIMA | |
|---|---|---|
 |
COLREGS demarcation line | |
 |
Limit of fishing areas (fish trap areas) | |
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Dumping ground | |
 |
Disposal area (Dump Site) | |
 |
Limit of airport | |
 |
Reservation line (Options) |
|
 |
Dump Site | |
| NOS | National Ocean Service (US) |
| NIMA | National Imagery and Mapping Agency (US) |
| IHO | International Hydrographic Organization |
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