NOAA S-57 chart cell
Alaska
US4AK7KT
- Usage band
- Approach · code 4
- Current edition
- 3.0
- Features
- 115
- S-57 layers
- 23
- Published
- May 22, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 70.50000° N
- South
- 70.20000° N
- West
- 146.40000° W
- East
- 145.20000° W
- Center
- 70.35000° N, 145.80000° W
- Bounds area
- 436 sq nm
- Feature density
- 0.2635 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 5
- Smallest layer
- 1
- Largest layer
- 28
- Area sq km
- 1,497
- Features per sq km
- 0.07683
- DEPARE Depth area 28
- DEPCNT Depth contour 27
- OBSTRN Obstruction 10
- COALNE Coastline 7
- LNDARE Land area 7
- M_QUAL Data quality 7
- SOUNDG Sounding 6
- SEAARE Sea area 3
- LNDRGN Land region 2
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SBDARE Seabed area 2
- WATTUR 2
- ADMARE 1
- BOYSPP Special purpose buoy 1
- CONZNE 1
- COSARE 1
- EXEZNE 1
- LIGHTS Light 1
- M_COVR Coverage 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/US4AK7KT.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK7KT/3.0/US4AK7KT.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK7KT/3.0/US4AK7KT.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK7KT/3.0/US4AK7KT.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK7KT/3.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 3.0 | May 22, 2026 | metadata.json |