NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3FH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 577
- S-57 layers
- 27
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.40000° N
- South
- 53.10000° N
- West
- 167.40000° W
- East
- 166.80000° W
- Center
- 53.25000° N, 167.10000° W
- Bounds area
- 388 sq nm
- Feature density
- 1.4862 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 21.4
- Smallest layer
- 1
- Largest layer
- 120
- Area sq km
- 1,332
- Features per sq km
- 0.43331
- UWTROC Underwater rock 120
- SBDARE Seabed area 94
- DEPCNT Depth contour 78
- DEPARE Depth area 72
- LNDARE Land area 67
- COALNE Coastline 38
- WEDKLP 33
- LNDELV 19
- RIVERS River 18
- OBSTRN Obstruction 6
- SLOTOP 5
- MAGVAR Magnetic variation 4
- SOUNDG Sounding 4
- LNDRGN Land region 3
- WATTUR 3
- SEAARE Sea area 2
- ACHARE Anchorage area 1
- ADMARE 1
- CONZNE 1
- EXEZNE 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/US4AK3FH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3FH/1.0/US4AK3FH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3FH/1.0/US4AK3FH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3FH/1.0/US4AK3FH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3FH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |