NOAA S-57 chart cell
Approaches to Calcasieu Pass - Mermentau River Channel
US4LA1FC
- Usage band
- Approach · code 4
- Current edition
- 1.3
- Features
- 458
- S-57 layers
- 28
- Published
- Apr 15, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 29.70000° N
- South
- 29.40000° N
- West
- 93.30000° W
- East
- 93.00000° W
- Center
- 29.55000° N, 93.15000° W
- Bounds area
- 282 sq nm
- Feature density
- 1.6228 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 16.4
- Smallest layer
- 1
- Largest layer
- 192
- Area sq km
- 968
- Features per sq km
- 0.47312
- PIPSOL 192
- OFSPLF 69
- SBDARE Seabed area 49
- OBSTRN Obstruction 25
- M_QUAL Data quality 20
- BOYLAT Lateral buoy 17
- LIGHTS Light 17
- DEPARE Depth area 13
- DEPCNT Depth contour 12
- SOUNDG Sounding 12
- WRECKS Wreck 6
- FAIRWY Fairway 4
- MAGVAR Magnetic variation 4
- SEAARE Sea area 3
- PILBOP 2
- ACHARE Anchorage area 1
- ADMARE 1
- CBLSUB 1
- CONZNE 1
- COSARE 1
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/US4LA1FC.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.003
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/US4LA1FC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4LA1FC/1.3/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.3 | Apr 15, 2026 | metadata.json |