NOAA S-57 chart cell
Unimak Pass and Vicinity
US4AK3LL
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 70
- S-57 layers
- 22
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.20000° N
- South
- 54.90000° N
- West
- 165.00000° W
- East
- 164.40000° W
- Center
- 55.05000° N, 164.70000° W
- Bounds area
- 372 sq nm
- Feature density
- 0.1883 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 3.2
- Smallest layer
- 1
- Largest layer
- 15
- Area sq km
- 1,275
- Features per sq km
- 0.0549
- SBDARE Seabed area 15
- M_QUAL Data quality 11
- SOUNDG Sounding 7
- DEPARE Depth area 6
- DEPCNT Depth contour 5
- RIVERS River 4
- SEAARE Sea area 3
- LNDELV 2
- MAGVAR Magnetic variation 2
- SLOGRD 2
- UWTROC Underwater rock 2
- ADMARE 1
- COALNE Coastline 1
- CONZNE 1
- EXEZNE 1
- LNDARE Land area 1
- LNDRGN Land region 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 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/US4AK3LL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3LL/1.0/US4AK3LL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3LL/1.0/US4AK3LL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3LL/1.0/US4AK3LL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3LL/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 7, 2024 | metadata.json |