NOAA S-57 chart cell

Mermentau River

US4LA1HE

Usage band
Approach · code 4
Current edition
1.1
Features
232
S-57 layers
37
Published
Aug 23, 2024
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
30.30000° N
South
30.00000° N
West
92.70000° W
East
92.40000° W
Center
30.15000° N, 92.55000° W
Bounds area
281 sq nm
Feature density
0.827 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
6.3
Smallest layer
1
Largest layer
38
Area sq km
962
Features per sq km
0.2411
  1. LNDRGN Land region 38
  2. COALNE Coastline 30
  3. RIVERS River 18
  4. BUAARE 13
  5. DAYMAR 11
  6. LNDARE Land area 11
  7. SLCONS Shoreline construction 11
  8. VEGATN 11
  9. BCNLAT Lateral beacon 10
  10. SILTNK 9
  11. CBLOHD 8
  12. BRIDGE 7
  13. SEAARE Sea area 7
  14. CANALS 6
  15. CTNARE Caution area 5
  16. DISMAR 5
  17. LIGHTS Light 4
  18. MAGVAR Magnetic variation 3
  19. PIPARE 3
  20. BCNSPP Special purpose beacon 2

Nearby Chart Cells

Approach usage band

  1. Bayou Lacassine and Mermentau River US4LA1HD - about 16 nm away
  2. Vermilion River US4LA1HF - about 16 nm away
  3. Gulf Intracoastal Waterway - Grand Lake and White Lake US4LA1GE - about 18 nm away
  4. Calcasieu River US4LA1ID - about 24 nm away
  5. Gulf Intracoastal Waterway - Grand Lake and Mermentau River US4LA1GD - about 24 nm away
  6. Gulf Intracoastal Waterway - Vermilion River to Vermilion Bay US4LA1GF - about 24 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
1.1 Aug 23, 2024 metadata.json