NOAA S-57 chart cell
Norton Sound, Alaska
US4AK6NT
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 544
- S-57 layers
- 30
- Published
- Sep 8, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 63.60000° N
- South
- 63.30000° N
- West
- 162.60000° W
- East
- 162.00000° W
- Center
- 63.45000° N, 162.30000° W
- Bounds area
- 290 sq nm
- Feature density
- 1.8756 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 18.1
- Smallest layer
- 1
- Largest layer
- 70
- Area sq km
- 995
- Features per sq km
- 0.54685
- COALNE Coastline 70
- LAKARE 69
- SBDARE Seabed area 61
- DEPARE Depth area 44
- DEPCNT Depth contour 44
- UWTROC Underwater rock 44
- LNDARE Land area 39
- OBSTRN Obstruction 32
- M_QUAL Data quality 25
- RIVERS River 22
- LNDELV 21
- SLOGRD 16
- LNDRGN Land region 15
- SEAARE Sea area 8
- SOUNDG Sounding 7
- SLCONS Shoreline construction 5
- BUAARE 4
- ADMARE 2
- BUISGL 2
- MAGVAR Magnetic variation 2
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/US4AK6NT.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK6NT/2.0/US4AK6NT.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK6NT/2.0/US4AK6NT.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK6NT/2.0/US4AK6NT.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK6NT/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Sep 8, 2025 | metadata.json |