| 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. |
|
