NOAA S-57 chart cell

Approaches to Galveston Bay

US4TX1MK

Usage band
Approach · code 4
Current edition
5.1
Features
1,256
S-57 layers
65
Published
Feb 5, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
29.40000° N
South
29.10000° N
West
94.80000° W
East
94.50000° W
Center
29.25000° N, 94.65000° W
Bounds area
283 sq nm
Feature density
4.4371 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
19.3
Smallest layer
1
Largest layer
178
Area sq km
971
Features per sq km
1.29364
  1. SLCONS Shoreline construction 178
  2. OBSTRN Obstruction 116
  3. SBDARE Seabed area 108
  4. DEPARE Depth area 100
  5. DEPCNT Depth contour 98
  6. M_QUAL Data quality 83
  7. LIGHTS Light 70
  8. COALNE Coastline 57
  9. PIPSOL 32
  10. BOYLAT Lateral buoy 31
  11. SOUNDG Sounding 28
  12. LNDRGN Land region 24
  13. RIVERS River 21
  14. WRECKS Wreck 21
  15. DAYMAR 18
  16. OFSPLF 18
  17. BUISGL 17
  18. BCNSPP Special purpose beacon 16
  19. FAIRWY Fairway 16
  20. DMPGRD 15

Nearby Chart Cells

Approach usage band

  1. Gulf Intracoastal Waterway - Galveston Bay, West Bay to Gulf of America US4TX1MJ - about 16 nm away
  2. approaches to Galveston Bay US4TX1ML - about 16 nm away
  3. Gulf Intracoastal Waterway - Galveston Bay, East Bay, Trinity Bay to Gulf of America US4TX1NK - about 18 nm away
  4. Gulf of America US4TX1LK - about 18 nm away
  5. Galveston Bay and Trinity Bay US4TX1NJ - about 24 nm away
  6. Gulf Intracoastal Waterway - East Bay to Gulf of America US4TX1NL - 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
5.1 Feb 5, 2026 metadata.json