NOAA S-57 chart cell
Mobile Bay
US4AL1CB
- Usage band
- Approach · code 4
- Current edition
- 9.0
- Features
- 2,983
- S-57 layers
- 49
- Published
- Mar 2, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.60000° N
- South
- 30.30000° N
- West
- 88.20000° W
- East
- 87.90000° W
- Center
- 30.45000° N, 88.05000° W
- Bounds area
- 280 sq nm
- Feature density
- 10.6654 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 60.9
- Smallest layer
- 1
- Largest layer
- 888
- Area sq km
- 959
- Features per sq km
- 3.10954
- SLCONS Shoreline construction 888
- COALNE Coastline 255
- DEPARE Depth area 182
- DEPCNT Depth contour 182
- LNDRGN Land region 157
- PILPNT 150
- DAYMAR 143
- BCNSPP Special purpose beacon 128
- LIGHTS Light 122
- SBDARE Seabed area 115
- OBSTRN Obstruction 101
- LNDARE Land area 75
- BCNLAT Lateral beacon 68
- M_QUAL Data quality 50
- DRGARE 39
- RIVERS River 37
- BOYLAT Lateral buoy 28
- MARCUL 26
- WRECKS Wreck 26
- SOUNDG Sounding 24
Nearby Chart Cells
Approach usage band
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.
- Original NOAA ZIP archive https://www.charts.noaa.gov/ENCs/US4AL1CB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AL1CB/9.0/US4AL1CB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AL1CB/9.0/US4AL1CB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AL1CB/9.0/US4AL1CB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AL1CB/9.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 9.0 | Mar 2, 2026 | metadata.json |