NOAA S-57 chart cell
Alaska
US4AK7NJ
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 60
- S-57 layers
- 16
- Published
- May 27, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 71.40000° N
- South
- 71.10000° N
- West
- 158.40000° W
- East
- 157.20000° W
- Center
- 71.25000° N, 157.80000° W
- Bounds area
- 417 sq nm
- Feature density
- 0.1438 / sq nm
Chart Statistics
16 largest layers shown
- Average features per layer
- 3.8
- Smallest layer
- 1
- Largest layer
- 16
- Area sq km
- 1,431
- Features per sq km
- 0.04194
- DEPARE Depth area 16
- DEPCNT Depth contour 12
- SOUNDG Sounding 9
- SBDARE Seabed area 5
- M_QUAL Data quality 3
- OBSTRN Obstruction 3
- M_NPUB 2
- MAGVAR Magnetic variation 2
- CBLSUB 1
- CONZNE 1
- COSARE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- SEAARE Sea area 1
- TESARE 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/US4AK7NJ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7NJ/2.0/US4AK7NJ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7NJ/2.0/US4AK7NJ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7NJ/2.0/US4AK7NJ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7NJ/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 27, 2026 | metadata.json |