NOAA S-57 chart cell
Knight Island
US4AK4RN
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 4,412
- S-57 layers
- 40
- Published
- Feb 20, 2024
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.30000° N
- South
- 60.00000° N
- West
- 148.20000° W
- East
- 147.60000° W
- Center
- 60.15000° N, 147.90000° W
- Bounds area
- 323 sq nm
- Feature density
- 13.6609 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 110.3
- Smallest layer
- 1
- Largest layer
- 1,235
- Area sq km
- 1,108
- Features per sq km
- 3.98288
- UWTROC Underwater rock 1,235
- DEPCNT Depth contour 696
- DEPARE Depth area 684
- SBDARE Seabed area 518
- LNDARE Land area 370
- COALNE Coastline 327
- RIVERS River 94
- OBSTRN Obstruction 77
- BUISGL 60
- M_QUAL Data quality 52
- LNDELV 51
- SEAARE Sea area 42
- SLCONS Shoreline construction 34
- WEDKLP 23
- SOUNDG Sounding 22
- LNDRGN Land region 20
- MORFAC 13
- LIGHTS Light 10
- BUAARE 9
- LAKARE 8
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/US4AK4RN.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4RN/1.0/US4AK4RN.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4RN/1.0/US4AK4RN.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4RN/1.0/US4AK4RN.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4RN/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Feb 20, 2024 | metadata.json |