NOAA S-57 chart cell
Bon Secour Bay and Mobile Bay
US4AL1CC
- Usage band
- Approach · code 4
- Current edition
- 6.1
- Features
- 1,050
- S-57 layers
- 38
- Published
- Jun 3, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 30.60000° N
- South
- 30.30000° N
- West
- 87.90000° W
- East
- 87.60000° W
- Center
- 30.45000° N, 87.75000° W
- Bounds area
- 280 sq nm
- Feature density
- 3.7542 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 27.6
- Smallest layer
- 1
- Largest layer
- 387
- Area sq km
- 959
- Features per sq km
- 1.09454
- SLCONS Shoreline construction 387
- COALNE Coastline 172
- LNDRGN Land region 62
- RIVERS River 47
- DAYMAR 45
- DEPARE Depth area 34
- OBSTRN Obstruction 34
- DEPCNT Depth contour 30
- PILPNT 26
- LIGHTS Light 25
- BCNLAT Lateral beacon 24
- BCNSPP Special purpose beacon 22
- LNDARE Land area 21
- SBDARE Seabed area 21
- M_QUAL Data quality 14
- SEAARE Sea area 14
- RETRFL 10
- BUAARE 8
- SOUNDG Sounding 7
- BRIDGE 6
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/US4AL1CC.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4AL1CC/6.1/US4AL1CC.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4AL1CC/6.1/US4AL1CC.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AL1CC/6.1/US4AL1CC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AL1CC/6.1/US4AL1CC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AL1CC/6.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 6.1 | Jun 3, 2026 | metadata.json |