NOAA S-57 chart cell
Alaska
US4AK3OU
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 1,218
- S-57 layers
- 25
- Published
- Jun 5, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 56.10000° N
- South
- 55.80000° N
- West
- 159.60000° W
- East
- 159.00000° W
- Center
- 55.95000° N, 159.30000° W
- Bounds area
- 363 sq nm
- Feature density
- 3.3525 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 48.7
- Smallest layer
- 1
- Largest layer
- 197
- Area sq km
- 1,246
- Features per sq km
- 0.97742
- DEPARE Depth area 197
- DEPCNT Depth contour 195
- UWTROC Underwater rock 186
- COALNE Coastline 159
- LNDARE Land area 149
- SBDARE Seabed area 80
- LNDELV 64
- OBSTRN Obstruction 52
- RIVERS River 46
- WEDKLP 32
- LNDRGN Land region 14
- M_QUAL Data quality 9
- SEAARE Sea area 9
- SLOGRD 7
- SOUNDG Sounding 4
- BUAARE 3
- LNDMRK 2
- MAGVAR Magnetic variation 2
- SLCONS Shoreline construction 2
- ADMARE 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/US4AK3OU.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3OU/2.0/US4AK3OU.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3OU/2.0/US4AK3OU.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3OU/2.0/US4AK3OU.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3OU/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Jun 5, 2026 | metadata.json |