NOAA S-57 chart cell
Andreanof Islands, AK
US4AK2BF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 96
- S-57 layers
- 21
- Published
- Aug 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 51.60000° N
- South
- 51.30000° N
- West
- 177.00000° W
- East
- 176.40000° W
- Center
- 51.45000° N, 176.70000° W
- Bounds area
- 404 sq nm
- Feature density
- 0.2374 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4.6
- Smallest layer
- 1
- Largest layer
- 27
- Area sq km
- 1,387
- Features per sq km
- 0.06922
- DEPARE Depth area 27
- DEPCNT Depth contour 25
- SBDARE Seabed area 6
- COALNE Coastline 5
- LNDARE Land area 5
- SOUNDG Sounding 4
- M_QUAL Data quality 3
- MAGVAR Magnetic variation 3
- UWTROC Underwater rock 3
- OBSTRN Obstruction 2
- RIVERS River 2
- TESARE 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- RESARE 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/US4AK2BF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK2BF/1.0/US4AK2BF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK2BF/1.0/US4AK2BF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK2BF/1.0/US4AK2BF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK2BF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 15, 2025 | metadata.json |