NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3GH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 4,639
- S-57 layers
- 32
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.70000° N
- South
- 53.40000° N
- West
- 167.40000° W
- East
- 166.80000° W
- Center
- 53.55000° N, 167.10000° W
- Bounds area
- 386 sq nm
- Feature density
- 12.0334 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 145
- Smallest layer
- 1
- Largest layer
- 1,288
- Area sq km
- 1,322
- Features per sq km
- 3.50838
- LNDARE Land area 1,288
- UWTROC Underwater rock 1,056
- COALNE Coastline 510
- DEPCNT Depth contour 378
- DEPARE Depth area 350
- SBDARE Seabed area 321
- RIVERS River 175
- LNDELV 156
- SLOTOP 121
- WEDKLP 110
- SLOGRD 42
- SEAARE Sea area 25
- OBSTRN Obstruction 20
- LNDRGN Land region 16
- TESARE 11
- BUISGL 10
- SOUNDG Sounding 10
- M_QUAL Data quality 6
- MAGVAR Magnetic variation 6
- ACHARE Anchorage area 4
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/US4AK3GH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3GH/1.0/US4AK3GH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3GH/1.0/US4AK3GH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3GH/1.0/US4AK3GH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3GH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |