NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3IH
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 79
- S-57 layers
- 17
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 54.30000° N
- South
- 54.00000° N
- West
- 167.40000° W
- East
- 166.80000° W
- Center
- 54.15000° N, 167.10000° W
- Bounds area
- 380 sq nm
- Feature density
- 0.2079 / sq nm
Chart Statistics
17 largest layers shown
- Average features per layer
- 4.6
- Smallest layer
- 1
- Largest layer
- 22
- Area sq km
- 1,303
- Features per sq km
- 0.06061
- DEPARE Depth area 22
- DEPCNT Depth contour 18
- WRECKS Wreck 12
- SBDARE Seabed area 5
- SOUNDG Sounding 5
- CTNARE Caution area 4
- M_QUAL Data quality 2
- MAGVAR Magnetic variation 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- RESARE 1
- SEAARE Sea area 1
- TESARE 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/US4AK3IH.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3IH/1.0/US4AK3IH.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3IH/1.0/US4AK3IH.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3IH/1.0/US4AK3IH.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3IH/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |