NOAA S-57 chart cell
Federated States of Micronesia - Unanu and Onou
US456607
- Usage band
- Approach · code 4
- Current edition
- 1.1
- Features
- 197
- S-57 layers
- 17
- Published
- Dec 16, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 8.82554° N
- South
- 8.71981° N
- West
- 150.21844° E
- East
- 150.35743° E
- Center
- 8.77268° N, 150.28793° E
- Bounds area
- 52 sq nm
- Feature density
- 3.7629 / sq nm
Chart Statistics
17 largest layers shown
- Average features per layer
- 11.6
- Smallest layer
- 1
- Largest layer
- 85
- Area sq km
- 180
- Features per sq km
- 1.09707
- SBDARE Seabed area 85
- DEPCNT Depth contour 33
- DEPARE Depth area 30
- UWTROC Underwater rock 10
- ADMARE 7
- COALNE Coastline 7
- LNDARE Land area 7
- VEGATN 5
- SOUNDG Sounding 3
- BUAARE 2
- SEAARE Sea area 2
- CTRPNT 1
- M_COVR Coverage 1
- M_NPUB 1
- M_NSYS 1
- M_QUAL Data quality 1
- MAGVAR Magnetic variation 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/US456607.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US456607/1.1/US456607.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US456607/1.1/US456607.001
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US456607/1.1/US456607.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US456607/1.1/US456607.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US456607/1.1/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.1 | Dec 16, 2025 | metadata.json |