NOAA S-57 chart cell

Connecticut

US4CT1AB

Usage band
Approach · code 4
Current edition
1.6
Features
1,215
S-57 layers
49
Published
May 5, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
41.40000° N
South
41.10000° N
West
73.20000° W
East
72.90000° W
Center
41.25000° N, 73.05000° W
Bounds area
244 sq nm
Feature density
4.981 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
24.8
Smallest layer
1
Largest layer
245
Area sq km
837
Features per sq km
1.45224
  1. SLCONS Shoreline construction 245
  2. COALNE Coastline 222
  3. LNDRGN Land region 78
  4. SBDARE Seabed area 78
  5. RIVERS River 76
  6. BRIDGE 56
  7. DEPARE Depth area 48
  8. DEPCNT Depth contour 44
  9. PONTON 43
  10. UWTROC Underwater rock 43
  11. BOYLAT Lateral buoy 39
  12. LIGHTS Light 35
  13. LNDARE Land area 33
  14. LNDMRK 27
  15. BUAARE 19
  16. M_QUAL Data quality 17
  17. SEAARE Sea area 11
  18. DAYMAR 9
  19. OBSTRN Obstruction 8
  20. BCNSPP Special purpose beacon 7

Nearby Chart Cells

Approach usage band

  1. North Shore of Long Island Sound, Norwalk Harbor to Southport Harbor US4CT1AA - about 14 nm away
  2. Connecticut US4CT1AC - about 14 nm away
  3. New York US4NY1BT - about 18 nm away
  4. Connecticut US4CT1BC - about 23 nm away
  5. New York US4NY1BS - about 23 nm away
  6. New York US4NY1BU - 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
1.6 May 5, 2026 metadata.json