NOAA S-57 chart cell
Alaska
US4AK3NT
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 1,166
- S-57 layers
- 28
- Published
- Jun 5, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.80000° N
- South
- 55.50000° N
- West
- 160.20000° W
- East
- 159.60000° W
- Center
- 55.65000° N, 159.90000° W
- Bounds area
- 366 sq nm
- Feature density
- 3.1847 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 41.6
- Smallest layer
- 1
- Largest layer
- 312
- Area sq km
- 1,256
- Features per sq km
- 0.92851
- DEPCNT Depth contour 312
- DEPARE Depth area 308
- UWTROC Underwater rock 150
- SBDARE Seabed area 106
- COALNE Coastline 44
- LNDELV 44
- OBSTRN Obstruction 44
- RIVERS River 44
- LNDARE Land area 38
- SEAARE Sea area 15
- WEDKLP 15
- LNDRGN Land region 10
- SOUNDG Sounding 6
- LNDMRK 5
- M_QUAL Data quality 4
- MAGVAR Magnetic variation 4
- LAKARE 3
- BUISGL 2
- ICEARE 2
- WATTUR 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/US4AK3NT.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3NT/2.0/US4AK3NT.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3NT/2.0/US4AK3NT.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3NT/2.0/US4AK3NT.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3NT/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 5, 2026 | metadata.json |