NOAA S-57 chart cell
Unimak Pass and Vicinity
US4AK3HL
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 45
- S-57 layers
- 15
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 54.00000° N
- South
- 53.70000° N
- West
- 165.00000° W
- East
- 164.40000° W
- Center
- 53.85000° N, 164.70000° W
- Bounds area
- 383 sq nm
- Feature density
- 0.1176 / sq nm
Chart Statistics
15 largest layers shown
- Average features per layer
- 3
- Smallest layer
- 1
- Largest layer
- 14
- Area sq km
- 1,313
- Features per sq km
- 0.03428
- DEPCNT Depth contour 14
- DEPARE Depth area 11
- SBDARE Seabed area 3
- M_QUAL Data quality 2
- MAGVAR Magnetic variation 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- WATTUR 2
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- RESARE 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/US4AK3HL.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3HL/1.0/US4AK3HL.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3HL/1.0/US4AK3HL.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3HL/1.0/US4AK3HL.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3HL/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 7, 2024 | metadata.json |