NOAA S-57 chart cell
Cochrane Bay to Passage Canal
US4AK4TM
- Usage band
- Approach · code 4
- Current edition
- 2.0
- Features
- 2,299
- S-57 layers
- 47
- Published
- May 1, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 60.90000° N
- South
- 60.60000° N
- West
- 148.80000° W
- East
- 148.20000° W
- Center
- 60.75000° N, 148.50000° W
- Bounds area
- 317 sq nm
- Feature density
- 7.2511 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 48.9
- Smallest layer
- 1
- Largest layer
- 605
- Area sq km
- 1,087
- Features per sq km
- 2.11409
- UWTROC Underwater rock 605
- DEPCNT Depth contour 325
- DEPARE Depth area 290
- SBDARE Seabed area 218
- RIVERS River 208
- LNDARE Land area 130
- COALNE Coastline 126
- LNDELV 54
- SLCONS Shoreline construction 38
- M_QUAL Data quality 35
- SEAARE Sea area 26
- OBSTRN Obstruction 24
- PONTON 22
- CBLSUB 20
- ICEARE 19
- MORFAC 19
- LNDRGN Land region 17
- PILPNT 17
- VEGATN 17
- BUISGL 16
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/US4AK4TM.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4AK4TM/2.0/US4AK4TM.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4AK4TM/2.0/US4AK4TM.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4AK4TM/2.0/US4AK4TM.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4AK4TM/2.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 2.0 | May 1, 2025 | metadata.json |