| NOS/NIMA /TH> | |
IHO/Foreign NIMA Charts |
|---|---|---|
| ED | Existence doubtful | ED |
| SD | Sounding doubtful | SD |
| Rep | Reported, but not yet surveyed | Rep |
 |
Reported (year of report), but not surveyed | Rep (1973) |
 |
Reported, but not confirmed sounding or danger |
 |
| NOS | National Ocean Service (US) |
| NIMA | National Imagery and Mapping Agency (US) |
| IHO | International Hydrographic Organization |
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