NOAA S-57 chart cell
Federated States of Micronesia - Ulithi Atoll, Southwest
US4TB4Z0
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,274
- S-57 layers
- 22
- Published
- Nov 4, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 10.00000° N
- South
- 9.00000° N
- West
- 139.00000° E
- East
- 140.00000° E
- Center
- 9.50000° N, 139.50000° E
- Bounds area
- 3,555 sq nm
- Feature density
- 0.3583 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 57.9
- Smallest layer
- 1
- Largest layer
- 444
- Area sq km
- 12,195
- Features per sq km
- 0.10447
- DEPCNT Depth contour 444
- DEPARE Depth area 379
- SBDARE Seabed area 203
- M_QUAL Data quality 53
- LNDARE Land area 27
- COALNE Coastline 26
- ADMARE 25
- SWPARE 25
- BUISGL 21
- TS_FEB 17
- VEGATN 16
- SEAARE Sea area 15
- UWTROC Underwater rock 6
- CTNARE Caution area 3
- OBSTRN Obstruction 3
- SOUNDG Sounding 3
- M_COVR Coverage 2
- MAGVAR Magnetic variation 2
- LNDELV 1
- M_NPUB 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/US4TB4Z0.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4TB4Z0/1.0/US4TB4Z0.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4TB4Z0/1.0/US4TB4Z0.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4TB4Z0/1.0/US4TB4Z0.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4TB4Z0/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Nov 4, 2025 | metadata.json |