NOAA S-57 chart cell

Saint Louis Bay to Mississippi Sound

US4MS1CD

Usage band
Approach · code 4
Current edition
1.2
Features
1,840
S-57 layers
46
Published
May 4, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
30.60000° N
South
30.30000° N
West
89.40000° W
East
89.10000° W
Center
30.45000° N, 89.25000° W
Bounds area
280 sq nm
Feature density
6.5787 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
40
Smallest layer
1
Largest layer
346
Area sq km
959
Features per sq km
1.91806
  1. SLCONS Shoreline construction 346
  2. RIVERS River 253
  3. COALNE Coastline 233
  4. PILPNT 184
  5. OBSTRN Obstruction 113
  6. LNDRGN Land region 95
  7. DEPARE Depth area 75
  8. DEPCNT Depth contour 72
  9. SBDARE Seabed area 65
  10. PIPSOL 48
  11. DAYMAR 40
  12. BCNLAT Lateral beacon 33
  13. M_QUAL Data quality 33
  14. LIGHTS Light 28
  15. SEAARE Sea area 22
  16. PONTON 19
  17. BUISGL 17
  18. LNDARE Land area 14
  19. WRECKS Wreck 14
  20. BCNSPP Special purpose beacon 13

Nearby Chart Cells

Approach usage band

  1. Mississippi Sound - Biloxi Bay to Bernard Bayou US4MS1CE - about 16 nm away
  2. Pearl River US4MS1CC - about 16 nm away
  3. Gulf Intracoastal Waterway - Mississippi Sound to Chandeleur Sound US4LA1HQ - about 18 nm away
  4. Chandeleur Sound to Mississippi Sound and Gulf of America US4MS1BE - about 24 nm away
  5. Gulf Intracoastal Waterway - Pearl River to Lake Borgne US4LA1HP - about 24 nm away
  6. Biloxi Bay and Pascagoula Bay US4MS1CF - about 31 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
1.2 May 4, 2026 metadata.json