NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3FG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 3,147
- S-57 layers
- 31
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.40000° N
- South
- 53.10000° N
- West
- 168.00000° W
- East
- 167.40000° W
- Center
- 53.25000° N, 167.70000° W
- Bounds area
- 388 sq nm
- Feature density
- 8.1059 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 101.5
- Smallest layer
- 1
- Largest layer
- 710
- Area sq km
- 1,332
- Features per sq km
- 2.36329
- UWTROC Underwater rock 710
- LNDARE Land area 656
- SBDARE Seabed area 428
- COALNE Coastline 327
- DEPCNT Depth contour 303
- DEPARE Depth area 286
- WEDKLP 140
- RIVERS River 73
- LNDELV 63
- SLOTOP 39
- WATTUR 28
- LNDRGN Land region 14
- OBSTRN Obstruction 14
- BUISGL 12
- SEAARE Sea area 9
- SOUNDG Sounding 9
- M_QUAL Data quality 8
- ACHARE Anchorage area 5
- MAGVAR Magnetic variation 5
- SLCONS Shoreline construction 3
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/US4AK3FG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3FG/1.0/US4AK3FG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3FG/1.0/US4AK3FG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3FG/1.0/US4AK3FG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3FG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |