NOAA S-57 chart cell
Alaska
US4AK3NU
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 611
- S-57 layers
- 29
- Published
- Jun 5, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.80000° N
- South
- 55.50000° N
- West
- 159.60000° W
- East
- 159.00000° W
- Center
- 55.65000° N, 159.30000° W
- Bounds area
- 366 sq nm
- Feature density
- 1.6688 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.1
- Smallest layer
- 1
- Largest layer
- 132
- Area sq km
- 1,256
- Features per sq km
- 0.48655
- DEPARE Depth area 132
- DEPCNT Depth contour 129
- UWTROC Underwater rock 125
- COALNE Coastline 41
- LNDARE Land area 36
- SBDARE Seabed area 36
- LNDELV 35
- OBSTRN Obstruction 22
- WEDKLP 14
- LNDRGN Land region 9
- RIVERS River 4
- MAGVAR Magnetic variation 3
- SEAARE Sea area 3
- SOUNDG Sounding 3
- WATTUR 3
- CTNARE Caution area 2
- LNDMRK 2
- ADMARE 1
- CBLSUB 1
- CONZNE 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/US4AK3NU.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3NU/2.0/US4AK3NU.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3NU/2.0/US4AK3NU.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3NU/2.0/US4AK3NU.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3NU/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 5, 2026 | metadata.json |