NOAA S-57 chart cell
Rat Islands, AK
US4AK1CY
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 185
- S-57 layers
- 24
- Published
- Apr 12, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 51.90000° N
- South
- 51.60000° N
- West
- 178.80000° E
- East
- 179.40000° E
- Center
- 51.75000° N, 179.10000° E
- Bounds area
- 402 sq nm
- Feature density
- 0.4605 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 7.7
- Smallest layer
- 1
- Largest layer
- 50
- Area sq km
- 1,378
- Features per sq km
- 0.13427
- DEPCNT Depth contour 50
- DEPARE Depth area 49
- UWTROC Underwater rock 28
- SBDARE Seabed area 12
- RIVERS River 9
- OBSTRN Obstruction 8
- LNDARE Land area 4
- COALNE Coastline 3
- LNDELV 2
- M_QUAL Data quality 2
- RESARE 2
- SEAARE Sea area 2
- SOUNDG Sounding 2
- TESARE 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- LNDRGN Land region 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/US4AK1CY.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK1CY/1.0/US4AK1CY.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK1CY/1.0/US4AK1CY.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK1CY/1.0/US4AK1CY.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK1CY/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Apr 12, 2024 | metadata.json |