NOAA S-57 chart cell

Gulf Intracoastal Waterway - Southern Laguna Madre, Brazos Santiago Pass to Gulf of America

US4TX1AC

Usage band
Approach · code 4
Current edition
3.4
Features
611
S-57 layers
56
Published
Jun 3, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
26.10000° N
South
25.80000° N
West
97.20000° W
East
96.90000° W
Center
25.95000° N, 97.05000° W
Bounds area
292 sq nm
Feature density
2.0944 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
10.9
Smallest layer
1
Largest layer
54
Area sq km
1,001
Features per sq km
0.61064
  1. DEPARE Depth area 54
  2. SLCONS Shoreline construction 47
  3. DEPCNT Depth contour 45
  4. DAYMAR 42
  5. COALNE Coastline 37
  6. BCNLAT Lateral beacon 35
  7. LIGHTS Light 35
  8. M_QUAL Data quality 33
  9. OBSTRN Obstruction 33
  10. LNDRGN Land region 26
  11. PILPNT 26
  12. BCNSPP Special purpose beacon 16
  13. LNDARE Land area 16
  14. SBDARE Seabed area 14
  15. BOYLAT Lateral buoy 13
  16. WRECKS Wreck 13
  17. DMPGRD 12
  18. SOUNDG Sounding 11
  19. RETRFL 9
  20. CTNARE Caution area 7

Nearby Chart Cells

Approach usage band

  1. Gulf Intracoastal Waterway - Southern Laguna Madre including Port Isabel and Port Brownsville US4TX1AB - about 16 nm away
  2. Laguna Madre and Gulf of America US4TX1BC - about 18 nm away
  3. Gulf Intracoastal Waterway - Southern Laguna Madre - Port Harlingen Channel US4TX1BB - about 24 nm away
  4. Gulf of America US4TX1CC - about 36 nm away
  5. Arroyo Colorado - Port Harlingen Channel US4TX1BA - about 37 nm away
  6. Gulf Intracoastal Waterway - Laguna Madre to Gulf of America including Port Mansfield Channel US4TX1CB - about 39 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
3.4 Jun 3, 2026 metadata.json