| NOS |
NIMA |
|
IHO |
Foreign NIMA Charts |
 |
Wreck, hull always dry (on large-scale charts) |
 |
|
 |
Wreck, covers and uncovers (on large-scale charts) |
 |
 |
|
Submerged wreck, depth known (on large-scale charts) |
 |
 |
|
 |
Submerged wreck, depth unknown (on large-scale charts) |
 |
 |
 |
Wreck showing any portion of hull or superstructure at level of chart datum |
 |
 |
 |
 |
Wreck showing mast or masts above chart datum only |
 |
|
 |
 |
Wreck, least depth known by sounding only |
 |
 |
 |
 |
Wreck, least depth known, swept by wire drag or diver |
 |
 |
 |
Dangerous wreck, depth unknown |
 |
|
 |
Sunken wreck, not dangerous to surface navigation |
 |
|
 |
 |
Wreck, least depth unknown, but considered to have a safe clearance to the depth shown |
 |
 |
|
 |
Foul ground, non-dangerous to navigation but to be avoided by vessels anchoring, trawling etc. |
 |
 |
|
Foul ground, non-dangerous to navigation but to be avoided by vessels anchoring, trawling etc. |
|
