NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3HH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 2,099
- S-57 layers
- 29
- Published
- May 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 54.00000° N
- South
- 53.70000° N
- West
- 167.40000° W
- East
- 166.80000° W
- Center
- 53.85000° N, 167.10000° W
- Bounds area
- 383 sq nm
- Feature density
- 5.4837 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 72.4
- Smallest layer
- 1
- Largest layer
- 564
- Area sq km
- 1,313
- Features per sq km
- 1.59878
- UWTROC Underwater rock 564
- LNDARE Land area 541
- SBDARE Seabed area 281
- DEPCNT Depth contour 151
- DEPARE Depth area 146
- COALNE Coastline 120
- WEDKLP 68
- LNDELV 67
- RIVERS River 34
- SLOTOP 32
- SLOGRD 27
- LNDRGN Land region 11
- OBSTRN Obstruction 9
- LNDMRK 7
- SEAARE Sea area 7
- LAKARE 6
- SOUNDG Sounding 6
- M_QUAL Data quality 4
- MAGVAR Magnetic variation 4
- BUISGL 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/US4AK3HH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3HH/1.0/US4AK3HH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3HH/1.0/US4AK3HH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3HH/1.0/US4AK3HH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3HH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | May 1, 2025 | metadata.json |