|
rocks wrecks and obstructions
Supplementary
National Symbols
| NOS |
NIMA |
|
Foreign NIMA Charts |
 |
|
Rock awash (height
unknown) |
|
 |
|
Shoal sounding on
isolated rock or rocks |
 |
 |
|
Sunken wreck covered 20
to 30 meters |
 |
 |
Submarine volcano
|
|
 |
Discolored water
|
|
 |
Sunken danger with depth
cleared (swept) by wire drag |
 |
 |
Reef of unknown extent
|
|
 |
 |
Coral reef, detached
(uncovers at sounding datum) |
|
 |
 |
Submerged Crib
|
 |
 |
Crib, Duck Blind (above
water) |
|
 |
Submerged Duck Blind
|
|
 |
Submerged Platform
|
|
|
