NOAA S-57 chart cell
Marmot Bay and Kupreanof Strait
US4AK4KF
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 3,053
- S-57 layers
- 42
- Published
- Sep 9, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 58.20000° N
- South
- 57.90000° N
- West
- 153.00000° W
- East
- 152.40000° W
- Center
- 58.05000° N, 152.70000° W
- Bounds area
- 343 sq nm
- Feature density
- 8.8913 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 72.7
- Smallest layer
- 1
- Largest layer
- 606
- Area sq km
- 1,178
- Features per sq km
- 2.59227
- UWTROC Underwater rock 606
- DEPCNT Depth contour 582
- DEPARE Depth area 565
- SBDARE Seabed area 293
- LNDARE Land area 247
- OBSTRN Obstruction 151
- WEDKLP 142
- COALNE Coastline 135
- LNDELV 55
- RIVERS River 55
- LNDRGN Land region 45
- SEAARE Sea area 40
- M_QUAL Data quality 22
- BUISGL 20
- DAYMAR 12
- LIGHTS Light 10
- SOUNDG Sounding 9
- BCNLAT Lateral beacon 8
- MORFAC 7
- SLCONS Shoreline construction 6
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/US4AK4KF.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4KF/2.0/US4AK4KF.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4KF/2.0/US4AK4KF.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4KF/2.0/US4AK4KF.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4KF/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | Sep 9, 2025 | metadata.json |