NOAA S-57 chart cell
North Pacific Ocean - Maro Reef, HI
US4HI3HP
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 1,174
- S-57 layers
- 21
- Published
- Aug 15, 2025
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 25.50000° N
- South
- 25.20000° N
- West
- 170.70000° W
- East
- 170.40000° W
- Center
- 25.35000° N, 170.55000° W
- Bounds area
- 293 sq nm
- Feature density
- 4.0041 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 55.9
- Smallest layer
- 1
- Largest layer
- 357
- Area sq km
- 1,006
- Features per sq km
- 1.16742
- UWTROC Underwater rock 357
- DEPCNT Depth contour 321
- DEPARE Depth area 244
- OBSTRN Obstruction 117
- SEAARE Sea area 71
- SBDARE Seabed area 30
- M_QUAL Data quality 7
- WATTUR 6
- CTNARE Caution area 4
- RESARE 4
- M_NPUB 2
- SOUNDG Sounding 2
- ADMARE 1
- CONZNE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- MAGVAR Magnetic variation 1
- TESARE 1
- UNSARE 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/US4HI3HP.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4HI3HP/1.0/US4HI3HP.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4HI3HP/1.0/US4HI3HP.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4HI3HP/1.0/US4HI3HP.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4HI3HP/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Aug 15, 2025 | metadata.json |