NOAA S-57 chart cell
Unimak Pass and Vicinity
US4AK3LM
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 114
- S-57 layers
- 24
- Published
- Aug 7, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 55.20000° N
- South
- 54.90000° N
- West
- 164.40000° W
- East
- 163.80000° W
- Center
- 55.05000° N, 164.10000° W
- Bounds area
- 372 sq nm
- Feature density
- 0.3067 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 4.8
- Smallest layer
- 1
- Largest layer
- 18
- Area sq km
- 1,275
- Features per sq km
- 0.08942
- SBDARE Seabed area 18
- COALNE Coastline 14
- DEPCNT Depth contour 14
- DEPARE Depth area 13
- RIVERS River 11
- M_QUAL Data quality 7
- UWTROC Underwater rock 7
- SOUNDG Sounding 6
- LNDRGN Land region 3
- OBSTRN Obstruction 3
- SEAARE Sea area 3
- LAKARE 2
- LNDARE Land area 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- LNDELV 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/US4AK3LM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3LM/1.0/US4AK3LM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3LM/1.0/US4AK3LM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3LM/1.0/US4AK3LM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3LM/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 7, 2024 | metadata.json |