NOAA S-57 chart cell
Unimak Pass and Vicinity
US4AK3IL
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,505
- S-57 layers
- 32
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 54.30000° N
- South
- 54.00000° N
- West
- 165.00000° W
- East
- 164.40000° W
- Center
- 54.15000° N, 164.70000° W
- Bounds area
- 380 sq nm
- Feature density
- 3.9603 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 47
- Smallest layer
- 1
- Largest layer
- 317
- Area sq km
- 1,303
- Features per sq km
- 1.15463
- DEPCNT Depth contour 317
- DEPARE Depth area 303
- LNDARE Land area 212
- SBDARE Seabed area 207
- UWTROC Underwater rock 175
- WEDKLP 85
- COALNE Coastline 53
- LNDELV 42
- OBSTRN Obstruction 30
- RIVERS River 19
- M_QUAL Data quality 13
- SLOTOP 10
- SEAARE Sea area 7
- SOUNDG Sounding 6
- LAKARE 5
- WATTUR 5
- ADMARE 1
- BCNSPP Special purpose beacon 1
- CBLSUB 1
- CONZNE 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/US4AK3IL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3IL/1.0/US4AK3IL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3IL/1.0/US4AK3IL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3IL/1.0/US4AK3IL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3IL/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 7, 2024 | metadata.json |