NOAA S-57 chart cell
Alaska
US4AK3RU
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 99
- S-57 layers
- 22
- Published
- Apr 25, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 57.00000° N
- South
- 56.70000° N
- West
- 159.60000° W
- East
- 159.00000° W
- Center
- 56.85000° N, 159.30000° W
- Bounds area
- 355 sq nm
- Feature density
- 0.279 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4.5
- Smallest layer
- 1
- Largest layer
- 16
- Area sq km
- 1,217
- Features per sq km
- 0.08135
- DEPCNT Depth contour 16
- DEPARE Depth area 15
- COALNE Coastline 11
- SBDARE Seabed area 11
- M_QUAL Data quality 10
- SLOTOP 5
- LNDARE Land area 4
- LNDRGN Land region 4
- LAKARE 3
- SOUNDG Sounding 3
- ADMARE 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- RIVERS River 2
- SEAARE Sea area 2
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- OBSTRN Obstruction 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/US4AK3RU.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3RU/1.0/US4AK3RU.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3RU/1.0/US4AK3RU.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3RU/1.0/US4AK3RU.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3RU/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 25, 2024 | metadata.json |