NOAA S-57 chart cell
Alaska
US4AK3QY
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 499
- S-57 layers
- 24
- Published
- Feb 20, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 56.70000° N
- South
- 56.40000° N
- West
- 157.20000° W
- East
- 156.60000° W
- Center
- 56.55000° N, 156.90000° W
- Bounds area
- 358 sq nm
- Feature density
- 1.3952 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 20.8
- Smallest layer
- 1
- Largest layer
- 114
- Area sq km
- 1,227
- Features per sq km
- 0.40676
- DEPCNT Depth contour 114
- DEPARE Depth area 109
- SBDARE Seabed area 96
- UWTROC Underwater rock 96
- WEDKLP 15
- COALNE Coastline 12
- LNDARE Land area 12
- M_QUAL Data quality 12
- OBSTRN Obstruction 7
- SOUNDG Sounding 7
- LNDELV 4
- ADMARE 2
- CBLSUB 2
- CONZNE 1
- EXEZNE 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/US4AK3QY.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3QY/1.0/US4AK3QY.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3QY/1.0/US4AK3QY.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3QY/1.0/US4AK3QY.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3QY/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Feb 20, 2025 | metadata.json |