NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3DB
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 344
- S-57 layers
- 24
- Published
- Jan 24, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 52.80000° N
- South
- 52.50000° N
- West
- 171.00000° W
- East
- 170.40000° W
- Center
- 52.65000° N, 170.70000° W
- Bounds area
- 394 sq nm
- Feature density
- 0.8738 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 14.3
- Smallest layer
- 1
- Largest layer
- 165
- Area sq km
- 1,350
- Features per sq km
- 0.25477
- LNDARE Land area 165
- DEPCNT Depth contour 34
- DEPARE Depth area 31
- COALNE Coastline 27
- UWTROC Underwater rock 26
- WEDKLP 15
- LNDELV 6
- SLOGRD 6
- SEAARE Sea area 5
- RIVERS River 4
- SBDARE Seabed area 4
- SOUNDG Sounding 4
- LNDRGN Land region 3
- M_QUAL Data quality 3
- WATTUR 2
- ADMARE 1
- LNDMRK 1
- LOCMAG 1
- M_COVR Coverage 1
- M_NPUB 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/US4AK3DB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3DB/1.0/US4AK3DB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3DB/1.0/US4AK3DB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3DB/1.0/US4AK3DB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3DB/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 24, 2024 | metadata.json |