NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3CA
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 122
- S-57 layers
- 20
- Published
- Jan 24, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 52.50000° N
- South
- 52.20000° N
- West
- 171.60000° W
- East
- 171.00000° W
- Center
- 52.35000° N, 171.30000° W
- Bounds area
- 396 sq nm
- Feature density
- 0.3078 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 6.1
- Smallest layer
- 1
- Largest layer
- 23
- Area sq km
- 1,359
- Features per sq km
- 0.08974
- DEPARE Depth area 23
- UWTROC Underwater rock 23
- DEPCNT Depth contour 22
- LNDARE Land area 16
- COALNE Coastline 9
- SOUNDG Sounding 6
- SBDARE Seabed area 4
- SEAARE Sea area 4
- M_QUAL Data quality 3
- OBSTRN Obstruction 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- LNDELV 1
- LOCMAG 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/US4AK3CA.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3CA/1.0/US4AK3CA.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3CA/1.0/US4AK3CA.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3CA/1.0/US4AK3CA.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3CA/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 24, 2024 | metadata.json |