NOAA S-57 chart cell
Alaska
US4AK7GB
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 25
- S-57 layers
- 13
- Published
- Jun 17, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 69.30000° N
- South
- 69.00000° N
- West
- 168.00000° W
- East
- 166.80000° W
- Center
- 69.15000° N, 167.40000° W
- Bounds area
- 462 sq nm
- Feature density
- 0.0541 / sq nm
Chart Statistics
13 largest layers shown
- Average features per layer
- 1.9
- Smallest layer
- 1
- Largest layer
- 5
- Area sq km
- 1,584
- Features per sq km
- 0.01578
- DEPARE Depth area 5
- DEPCNT Depth contour 4
- MAGVAR Magnetic variation 3
- SOUNDG Sounding 3
- M_NPUB 2
- CBLSUB 1
- CONZNE 1
- COSARE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- M_QUAL Data quality 1
- SEAARE Sea area 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/US4AK7GB.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7GB/3.0/US4AK7GB.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7GB/3.0/US4AK7GB.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7GB/3.0/US4AK7GB.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7GB/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | Jun 17, 2026 | metadata.json |