NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3EB
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 76
- S-57 layers
- 14
- Published
- Jan 24, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.10000° N
- South
- 52.80000° N
- West
- 171.00000° W
- East
- 170.40000° W
- Center
- 52.95000° N, 170.70000° W
- Bounds area
- 391 sq nm
- Feature density
- 0.1944 / sq nm
Chart Statistics
14 largest layers shown
- Average features per layer
- 5.4
- Smallest layer
- 1
- Largest layer
- 35
- Area sq km
- 1,341
- Features per sq km
- 0.05668
- DEPCNT Depth contour 35
- DEPARE Depth area 23
- M_QUAL Data quality 4
- SOUNDG Sounding 3
- MAGVAR Magnetic variation 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- RESARE 1
- SBDARE Seabed area 1
- SEAARE Sea area 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/US4AK3EB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3EB/1.0/US4AK3EB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3EB/1.0/US4AK3EB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3EB/1.0/US4AK3EB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3EB/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 24, 2024 | metadata.json |