NOAA S-57 chart cell

Southern Massachusetts

US4MA1DC

Usage band
Approach · code 4
Current edition
2.26
Features
816
S-57 layers
43
Published
May 18, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

Loading map
North
41.40000° N
South
41.10000° N
West
71.10000° W
East
70.80000° W
Center
41.25000° N, 70.95000° W
Bounds area
244 sq nm
Feature density
3.3453 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
19
Smallest layer
1
Largest layer
230
Area sq km
837
Features per sq km
0.97533
  1. UWTROC Underwater rock 230
  2. DEPCNT Depth contour 115
  3. DEPARE Depth area 101
  4. SBDARE Seabed area 96
  5. M_QUAL Data quality 37
  6. LNDARE Land area 36
  7. LIGHTS Light 33
  8. LNDMRK 29
  9. SOUNDG Sounding 20
  10. CBLSUB 14
  11. COALNE Coastline 14
  12. LAKARE 9
  13. OBSTRN Obstruction 8
  14. SEAARE Sea area 8
  15. BOYLAT Lateral buoy 7
  16. CTNARE Caution area 7
  17. LNDRGN Land region 6
  18. WRECKS Wreck 6
  19. RIVERS River 5
  20. FOGSIG 4

Nearby Chart Cells

Approach usage band

  1. Southern Massachusetts US4MA1DD - about 14 nm away
  2. Rhode Island US4RI1DB - about 14 nm away
  3. Southern Massachusetts US4MA1CC - about 18 nm away
  4. Southern Massachusetts US4MA1EC - about 18 nm away
  5. Southern Massachusetts US4MA1ED - about 23 nm away
  6. Rhode Island US4RI1EB - 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
2.26 May 18, 2026 metadata.json