NOAA S-57 chart cell
Kvichak Bay - Halfmoon Bay
US4AK3YX
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 141
- S-57 layers
- 16
- Published
- Oct 12, 2023
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 59.10000° N
- South
- 58.80000° N
- West
- 157.80000° W
- East
- 157.20000° W
- Center
- 58.95000° N, 157.50000° W
- Bounds area
- 335 sq nm
- Feature density
- 0.4213 / sq nm
Chart Statistics
16 largest layers shown
- Average features per layer
- 8.8
- Smallest layer
- 1
- Largest layer
- 39
- Area sq km
- 1,148
- Features per sq km
- 0.12283
- COALNE Coastline 39
- LNDARE Land area 31
- DEPARE Depth area 17
- RIVERS River 15
- DEPCNT Depth contour 13
- SEAARE Sea area 5
- CTNARE Caution area 4
- M_QUAL Data quality 4
- MAGVAR Magnetic variation 3
- BUISGL 2
- SBDARE Seabed area 2
- SOUNDG Sounding 2
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- WATTUR 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/US4AK3YX.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK3YX/1.0/US4AK3YX.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK3YX/1.0/US4AK3YX.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK3YX/1.0/US4AK3YX.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK3YX/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Oct 12, 2023 | metadata.json |