NOAA S-57 chart cell
Amukta Pass to Unalaska Island, AK
US4AK3GG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,229
- S-57 layers
- 33
- Published
- Apr 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 53.70000° N
- South
- 53.40000° N
- West
- 168.00000° W
- East
- 167.40000° W
- Center
- 53.55000° N, 167.70000° W
- Bounds area
- 386 sq nm
- Feature density
- 3.188 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 37.2
- Smallest layer
- 1
- Largest layer
- 256
- Area sq km
- 1,322
- Features per sq km
- 0.92947
- LNDARE Land area 256
- UWTROC Underwater rock 195
- SBDARE Seabed area 150
- DEPCNT Depth contour 149
- DEPARE Depth area 134
- COALNE Coastline 108
- WEDKLP 55
- RIVERS River 34
- LNDELV 32
- SLOTOP 31
- SOUNDG Sounding 13
- OBSTRN Obstruction 11
- M_QUAL Data quality 10
- LNDRGN Land region 7
- MAGVAR Magnetic variation 7
- SLCONS Shoreline construction 7
- SEAARE Sea area 6
- BUISGL 3
- MORFAC 3
- CTNARE Caution area 2
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/US4AK3GG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3GG/1.0/US4AK3GG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3GG/1.0/US4AK3GG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3GG/1.0/US4AK3GG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3GG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 15, 2025 | metadata.json |