NOAA S-57 chart cell
Marmot Bay
US4AK4KG
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,191
- S-57 layers
- 32
- Published
- Jul 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 58.20000° N
- South
- 57.90000° N
- West
- 152.40000° W
- East
- 151.80000° W
- Center
- 58.05000° N, 152.10000° W
- Bounds area
- 343 sq nm
- Feature density
- 3.4686 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 37.2
- Smallest layer
- 1
- Largest layer
- 242
- Area sq km
- 1,178
- Features per sq km
- 1.01127
- DEPCNT Depth contour 242
- DEPARE Depth area 232
- UWTROC Underwater rock 207
- SBDARE Seabed area 131
- LNDARE Land area 124
- COALNE Coastline 104
- WEDKLP 31
- LNDELV 22
- OBSTRN Obstruction 14
- RIVERS River 14
- M_QUAL Data quality 12
- SOUNDG Sounding 11
- LNDRGN Land region 10
- SEAARE Sea area 9
- LAKARE 5
- ADMARE 2
- BUISGL 2
- CBLSUB 2
- CTNARE Caution area 2
- MAGVAR Magnetic variation 2
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/US4AK4KG.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4KG/1.0/US4AK4KG.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4KG/1.0/US4AK4KG.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4KG/1.0/US4AK4KG.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4KG/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jul 1, 2025 | metadata.json |