NOAA S-57 chart cell
North Atlantic Ocean
US4MD1BI
- Usage band
- Approach · code 4
- Current edition
- 1.0
- Features
- 264
- S-57 layers
- 17
- Published
- Jan 14, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 38.40000° N
- South
- 38.10000° N
- West
- 75.00000° W
- East
- 74.70000° W
- Center
- 38.25000° N, 74.85000° W
- Bounds area
- 255 sq nm
- Feature density
- 1.0362 / sq nm
Chart Statistics
17 largest layers shown
- Average features per layer
- 15.5
- Smallest layer
- 1
- Largest layer
- 92
- Area sq km
- 874
- Features per sq km
- 0.3021
- DEPCNT Depth contour 92
- DEPARE Depth area 85
- SBDARE Seabed area 37
- OBSTRN Obstruction 12
- M_QUAL Data quality 10
- WRECKS Wreck 10
- SOUNDG Sounding 5
- M_NPUB 2
- MAGVAR Magnetic variation 2
- SEAARE Sea area 2
- ADMARE 1
- CONZNE 1
- COSARE 1
- EXEZNE 1
- M_COVR Coverage 1
- M_NSYS 1
- TESARE 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/US4MD1BI.zip
- S-57 cell https://charts.openships.ai/noaa/s57/approach/US4MD1BI/1.0/US4MD1BI.000
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MD1BI/1.0/US4MD1BI.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MD1BI/1.0/US4MD1BI.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MD1BI/1.0/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.0 | Jan 14, 2026 | metadata.json |