NOAA S-57 chart cell
Rat Islands, AK
US4AK1CW
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 306
- S-57 layers
- 21
- Published
- Apr 12, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 51.90000° N
- South
- 51.60000° N
- West
- 177.60000° E
- East
- 178.20000° E
- Center
- 51.75000° N, 177.90000° E
- Bounds area
- 402 sq nm
- Feature density
- 0.7617 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 14.6
- Smallest layer
- 1
- Largest layer
- 127
- Area sq km
- 1,378
- Features per sq km
- 0.22209
- DEPARE Depth area 127
- DEPCNT Depth contour 125
- SBDARE Seabed area 19
- M_QUAL Data quality 4
- SEAARE Sea area 4
- SOUNDG Sounding 4
- WATTUR 4
- WEDKLP 3
- ADMARE 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- COALNE Coastline 1
- CONZNE 1
- CTNARE Caution area 1
- EXEZNE 1
- LNDARE Land area 1
- M_COVR Coverage 1
- M_NSYS 1
- OBSTRN Obstruction 1
- RESARE 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/US4AK1CW.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK1CW/1.0/US4AK1CW.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK1CW/1.0/US4AK1CW.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK1CW/1.0/US4AK1CW.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK1CW/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 12, 2024 | metadata.json |