NOAA S-57 chart cell
Norton Sound, Alaska
US4AK6NS
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 95
- S-57 layers
- 22
- Published
- Sep 8, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 63.60000° N
- South
- 63.30000° N
- West
- 163.20000° W
- East
- 162.60000° W
- Center
- 63.45000° N, 162.90000° W
- Bounds area
- 290 sq nm
- Feature density
- 0.3275 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4.3
- Smallest layer
- 1
- Largest layer
- 18
- Area sq km
- 995
- Features per sq km
- 0.0955
- DEPARE Depth area 18
- DEPCNT Depth contour 17
- SBDARE Seabed area 12
- UWTROC Underwater rock 10
- M_QUAL Data quality 9
- COALNE Coastline 4
- LNDARE Land area 4
- SLOGRD 3
- ADMARE 2
- OBSTRN Obstruction 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- CONZNE 1
- EXEZNE 1
- LNDELV 1
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 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/US4AK6NS.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4AK6NS/1.1/US4AK6NS.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4AK6NS/1.1/US4AK6NS.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK6NS/1.1/US4AK6NS.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK6NS/1.1/US4AK6NS.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK6NS/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Sep 8, 2025 | metadata.json |