NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3EF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 298
- S-57 layers
- 22
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.10000° N
- South
- 52.80000° N
- West
- 168.60000° W
- East
- 168.00000° W
- Center
- 52.95000° N, 168.30000° W
- Bounds area
- 391 sq nm
- Feature density
- 0.7622 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 13.5
- Smallest layer
- 1
- Largest layer
- 63
- Area sq km
- 1,341
- Features per sq km
- 0.22223
- DEPARE Depth area 63
- DEPCNT Depth contour 63
- LNDARE Land area 52
- COALNE Coastline 51
- SBDARE Seabed area 22
- UWTROC Underwater rock 20
- LNDELV 6
- LNDRGN Land region 3
- M_QUAL Data quality 2
- RIVERS River 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 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/US4AK3EF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3EF/1.0/US4AK3EF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3EF/1.0/US4AK3EF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3EF/1.0/US4AK3EF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3EF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |