NOAA S-57 chart cell

Southern Massachusetts

US4MA1DD

Usage band
Approach · code 4
Current edition
1.7
Features
487
S-57 layers
42
Published
Apr 30, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
41.40000° N
South
41.10000° N
West
70.80000° W
East
70.50000° W
Center
41.25000° N, 70.65000° W
Bounds area
244 sq nm
Feature density
1.9965 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
11.6
Smallest layer
1
Largest layer
63
Area sq km
837
Features per sq km
0.58209
  1. COALNE Coastline 63
  2. UWTROC Underwater rock 59
  3. DEPCNT Depth contour 54
  4. DEPARE Depth area 49
  5. LNDRGN Land region 38
  6. SBDARE Seabed area 37
  7. LAKARE 29
  8. SLCONS Shoreline construction 23
  9. M_QUAL Data quality 19
  10. SEAARE Sea area 16
  11. SOUNDG Sounding 14
  12. LNDARE Land area 10
  13. RIVERS River 9
  14. LNDMRK 8
  15. CTNARE Caution area 7
  16. LIGHTS Light 7
  17. RESARE 5
  18. OBSTRN Obstruction 4
  19. ACHARE Anchorage area 3
  20. BUAARE 3

Nearby Chart Cells

Approach usage band

  1. Southern Massachusetts US4MA1DC - about 14 nm away
  2. Southern Massachusetts US4MA1DE - about 14 nm away
  3. Southern Massachusetts US4MA1CD - about 18 nm away
  4. Southern Massachusetts US4MA1ED - about 18 nm away
  5. Southern Massachusetts US4MA1EC - about 23 nm away
  6. Southern Massachusetts US4MA1EE - about 23 nm away

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.

Editions

Edition Published Metadata
1.7 Apr 30, 2026 metadata.json