NOAA S-57 chart cell

Approaches to Mississippi River

US3GC04M

Usage band
Coastal · code 3
Current edition
78.3
Features
1,260
S-57 layers
39
Published
Jan 13, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

Loading map
North
30.36067° N
South
27.88919° N
West
90.28088° W
East
88.29078° W
Center
29.12493° N, 89.28583° W
Bounds area
15,487 sq nm
Feature density
0.0814 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
32.3
Smallest layer
1
Largest layer
791
Area sq km
53,121
Features per sq km
0.02372
  1. PIPSOL 791
  2. SBDARE Seabed area 86
  3. OBSTRN Obstruction 81
  4. OFSPLF 48
  5. SOUNDG Sounding 33
  6. DEPARE Depth area 26
  7. LIGHTS Light 25
  8. WRECKS Wreck 25
  9. DEPCNT Depth contour 24
  10. BOYSPP Special purpose buoy 21
  11. M_QUAL Data quality 18
  12. LNDARE Land area 12
  13. COALNE Coastline 9
  14. BOYLAT Lateral buoy 7
  15. MAGVAR Magnetic variation 6
  16. TESARE 5
  17. DMPGRD 4
  18. LNDMRK 4
  19. SEAARE Sea area 4
  20. SLCONS Shoreline construction 4

Nearby Chart Cells

Coastal usage band

  1. Approaches to Mississippi River and Gulf of America US3LA1CD - about 18 nm away
  2. Mississippi Canyon and Gulf of America US3LA1BD - about 56 nm away
  3. Approaches to Mobile Bay and Mississippi Sound and Gulf of America US3AL1AA - about 59 nm away
  4. Gulf Intracoastal Waterway - New Orleans to Morgan Ciy and Gulf of America US3LA1CC - about 71 nm away
  5. Gulf of America US3LA1BE - about 80 nm away
  6. Mississippi Canyon and Gulf of America US3LA1BC - about 89 nm away

Current Edition Files

The NOAA ZIP archive is the upstream source for this chart cell; the other files are Open Ships generated derivatives for web and GIS use.

Editions

Edition Published Metadata
78.3 Jan 13, 2026 metadata.json