NOAA S-57 chart cell
Southern Massachusetts
US4MA1EC
- Usage band
- Approach · code 4
- Current edition
- 1.13
- Features
- 3,033
- S-57 layers
- 57
- Published
- Apr 30, 2026
- Manifest updated
- Jun 22, 2026, 2:51 PM UTC
Coverage
- North
- 41.70000° N
- South
- 41.40000° N
- West
- 71.10000° W
- East
- 70.80000° W
- Center
- 41.55000° N, 70.95000° W
- Bounds area
- 243 sq nm
- Feature density
- 12.4917 / sq nm
Chart Statistics
20 largest layers shown
- Average features per layer
- 53.2
- Smallest layer
- 1
- Largest layer
- 797
- Area sq km
- 833
- Features per sq km
- 3.64199
- UWTROC Underwater rock 797
- DEPCNT Depth contour 390
- DEPARE Depth area 372
- COALNE Coastline 251
- LNDRGN Land region 154
- SLCONS Shoreline construction 149
- LNDARE Land area 124
- SBDARE Seabed area 105
- BOYLAT Lateral buoy 98
- RIVERS River 89
- LIGHTS Light 57
- OBSTRN Obstruction 56
- M_QUAL Data quality 52
- SEAARE Sea area 47
- LNDMRK 34
- WRECKS Wreck 30
- BRIDGE 24
- BUISGL 23
- CTNARE Caution area 19
- FOGSIG 15
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/US4MA1EC.zip
- S-57 base cell https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.000
- S-57 update 001 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.001
- S-57 update 002 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.002
- S-57 update 003 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.003
- S-57 update 004 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.004
- S-57 update 005 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.005
- S-57 update 006 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.006
- S-57 update 007 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.007
- S-57 update 008 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.008
- S-57 update 009 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.009
- S-57 update 010 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.010
- S-57 update 011 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.011
- S-57 update 012 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.012
- S-57 update 013 https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.013
- GeoJSON https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.geojson
- GeoParquet https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/US4MA1EC.parquet
- Metadata JSON https://charts.openships.ai/noaa/s57/approach/US4MA1EC/1.13/metadata.json
Editions
| Edition | Published | Metadata |
|---|---|---|
| 1.13 | Apr 30, 2026 | metadata.json |