NOAA S-57 chart cell
Rat Islands, AK
US3AK1BC
- Usage band
- Coastal · code 3
- Current edition
- 1.0
- Features
- 578
- S-57 layers
- 31
- Published
- May 19, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 52.80000° N
- South
- 51.60000° N
- West
- 175.20000° E
- East
- 177.60000° E
- Center
- 52.20000° N, 176.40000° E
- Bounds area
- 6,363 sq nm
- Feature density
- 0.0908 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 18.6
- Smallest layer
- 1
- Largest layer
- 104
- Area sq km
- 21,825
- Features per sq km
- 0.02648
- DEPARE Depth area 104
- DEPCNT Depth contour 103
- UWTROC Underwater rock 78
- LNDARE Land area 75
- COALNE Coastline 41
- RIVERS River 23
- SBDARE Seabed area 23
- OBSTRN Obstruction 18
- SEAARE Sea area 18
- LNDELV 15
- WEDKLP 14
- LNDRGN Land region 13
- SOUNDG Sounding 8
- M_QUAL Data quality 7
- WATTUR 7
- MAGVAR Magnetic variation 5
- DMPGRD 4
- LAKARE 4
- SLCONS Shoreline construction 3
- ADMARE 2
Nearby Chart Cells
Coastal 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/US3AK1BC.zip
- S-57 cell https://charts.openships.ai/noaa/s57/coastal/US3AK1BC/1.0/US3AK1BC.000
- GeoJSON https://charts.openships.ai/noaa/s57/coastal/US3AK1BC/1.0/US3AK1BC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/coastal/US3AK1BC/1.0/US3AK1BC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/coastal/US3AK1BC/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | May 19, 2026 | metadata.json |