NOAA S-57 chart cell
Prince William Sound, Alaska
US4AK4SQ
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 1,533
- S-57 layers
- 44
- Published
- May 15, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.60000° N
- South
- 60.30000° N
- West
- 146.40000° W
- East
- 145.80000° W
- Center
- 60.45000° N, 146.10000° W
- Bounds area
- 320 sq nm
- Feature density
- 4.7904 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 34.8
- Smallest layer
- 1
- Largest layer
- 364
- Area sq km
- 1,098
- Features per sq km
- 1.39666
- DEPCNT Depth contour 364
- UWTROC Underwater rock 248
- DEPARE Depth area 211
- COALNE Coastline 170
- LNDARE Land area 112
- RIVERS River 97
- SBDARE Seabed area 87
- LAKARE 46
- OBSTRN Obstruction 32
- M_QUAL Data quality 27
- LNDRGN Land region 26
- SEAARE Sea area 22
- LNDELV 10
- SOUNDG Sounding 10
- SLOGRD 9
- WEDKLP 7
- WATTUR 5
- CTNARE Caution area 4
- CBLSUB 3
- LIGHTS Light 3
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/US4AK4SQ.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4SQ/2.0/US4AK4SQ.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4SQ/2.0/US4AK4SQ.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4SQ/2.0/US4AK4SQ.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4SQ/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 15, 2026 | metadata.json |