NOAA S-57 chart cell

Approaches to Mississippi River and Gulf of America

US3LA1CD

Usage band
Coastal · code 3
Current edition
2.1
Features
2,300
S-57 layers
55
Published
Apr 20, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
30.00000° N
South
28.80000° N
West
90.00000° W
East
88.80000° W
Center
29.40000° N, 89.40000° W
Bounds area
4,522 sq nm
Feature density
0.5086 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
41.8
Smallest layer
1
Largest layer
567
Area sq km
15,511
Features per sq km
0.14828
  1. COALNE Coastline 567
  2. LNDARE Land area 510
  3. OBSTRN Obstruction 201
  4. LNDRGN Land region 113
  5. DEPARE Depth area 88
  6. WRECKS Wreck 87
  7. DEPCNT Depth contour 80
  8. SBDARE Seabed area 67
  9. LIGHTS Light 65
  10. SEAARE Sea area 57
  11. PIPSOL 48
  12. SOUNDG Sounding 46
  13. DAYMAR 34
  14. BCNLAT Lateral beacon 31
  15. RIVERS River 26
  16. PILPNT 25
  17. BUAARE 21
  18. BOYSPP Special purpose buoy 19
  19. SLCONS Shoreline construction 18
  20. BOYLAT Lateral buoy 16

Nearby Chart Cells

Coastal usage band

  1. Approaches to Mississippi River US3GC04M - about 18 nm away
  2. Gulf Intracoastal Waterway - New Orleans to Morgan Ciy and Gulf of America US3LA1CC - about 63 nm away
  3. Approaches to Mobile Bay and Mississippi Sound and Gulf of America US3AL1AA - about 63 nm away
  4. Mississippi Canyon and Gulf of America US3LA1BD - about 72 nm away
  5. Gulf Intracoastal Waterway - Lake Pontchartrain, Mississippi Sound to Gulf of America US3MS1AA - about 72 nm away
  6. Lake Pontchartrain US3LA1DC - about 95 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
2.1 Apr 20, 2026 metadata.json