NOAA S-57 chart cell
Unimak Pass and Vicinity
US4AK3KM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 77
- S-57 layers
- 18
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 54.90000° N
- South
- 54.60000° N
- West
- 164.40000° W
- East
- 163.80000° W
- Center
- 54.75000° N, 164.10000° W
- Bounds area
- 374 sq nm
- Feature density
- 0.2056 / sq nm
Chart Statistics
18 largest layers shown
- Average features per layer
- 4.3
- Smallest layer
- 1
- Largest layer
- 13
- Area sq km
- 1,284
- Features per sq km
- 0.05995
- RIVERS River 13
- SLOGRD 12
- LNDELV 11
- COALNE Coastline 7
- DEPARE Depth area 6
- LAKARE 5
- SEAARE Sea area 5
- DEPCNT Depth contour 4
- LNDARE Land area 3
- M_QUAL Data quality 2
- UWTROC Underwater rock 2
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- MAGVAR Magnetic variation 1
- RESARE 1
- SOUNDG Sounding 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/US4AK3KM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3KM/1.0/US4AK3KM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3KM/1.0/US4AK3KM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3KM/1.0/US4AK3KM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3KM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 7, 2024 | metadata.json |