NOAA S-57 chart cell
Norton Sound, Alaska
US4AK6OU
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 46
- S-57 layers
- 19
- Published
- Sep 5, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 63.90000° N
- South
- 63.60000° N
- West
- 162.00000° W
- East
- 161.40000° W
- Center
- 63.75000° N, 161.70000° W
- Bounds area
- 287 sq nm
- Feature density
- 0.1603 / sq nm
Chart Statistics
19 largest layers shown
- Average features per layer
- 2.4
- Smallest layer
- 1
- Largest layer
- 11
- Area sq km
- 984
- Features per sq km
- 0.04673
- SBDARE Seabed area 11
- M_QUAL Data quality 9
- DEPARE Depth area 4
- SOUNDG Sounding 4
- DEPCNT Depth contour 3
- MAGVAR Magnetic variation 2
- ADMARE 1
- BCNSPP Special purpose beacon 1
- COALNE Coastline 1
- CONZNE 1
- DAYMAR 1
- EXEZNE 1
- LIGHTS Light 1
- LNDARE Land area 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- SEAARE Sea area 1
- TESARE 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/US4AK6OU.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4AK6OU/1.1/US4AK6OU.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4AK6OU/1.1/US4AK6OU.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK6OU/1.1/US4AK6OU.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK6OU/1.1/US4AK6OU.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK6OU/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Sep 5, 2025 | metadata.json |