NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3GF
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 221
- S-57 layers
- 25
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.70000° N
- South
- 53.40000° N
- West
- 168.60000° W
- East
- 168.00000° W
- Center
- 53.55000° N, 168.30000° W
- Bounds area
- 386 sq nm
- Feature density
- 0.5733 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 8.8
- Smallest layer
- 1
- Largest layer
- 42
- Area sq km
- 1,322
- Features per sq km
- 0.16714
- DEPARE Depth area 42
- DEPCNT Depth contour 40
- COALNE Coastline 21
- RIVERS River 21
- SBDARE Seabed area 21
- LNDARE Land area 19
- UWTROC Underwater rock 17
- LNDRGN Land region 9
- WEDKLP 5
- LNDELV 4
- MAGVAR Magnetic variation 3
- SEAARE Sea area 3
- M_QUAL Data quality 2
- SLOGRD 2
- SOUNDG Sounding 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- LOCMAG 1
- M_COVR Coverage 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/US4AK3GF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3GF/1.0/US4AK3GF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3GF/1.0/US4AK3GF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3GF/1.0/US4AK3GF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3GF/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |