NOAA S-57 chart cell

New Hampshire

US4NH1BD

Usage band
Approach · code 4
Current edition
1.7
Features
1,678
S-57 layers
54
Published
Feb 12, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

Loading map
North
43.20000° N
South
42.90000° N
West
70.80000° W
East
70.50000° W
Center
43.05000° N, 70.65000° W
Bounds area
237 sq nm
Feature density
7.0776 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
31.1
Smallest layer
1
Largest layer
371
Area sq km
813
Features per sq km
2.0635
  1. DEPCNT Depth contour 371
  2. DEPARE Depth area 363
  3. SBDARE Seabed area 198
  4. UWTROC Underwater rock 133
  5. COALNE Coastline 93
  6. RIVERS River 64
  7. LNDARE Land area 55
  8. LNDRGN Land region 48
  9. SLCONS Shoreline construction 45
  10. BUISGL 29
  11. SEAARE Sea area 27
  12. BOYLAT Lateral buoy 22
  13. LIGHTS Light 20
  14. BRIDGE 19
  15. SOUNDG Sounding 17
  16. LNDMRK 16
  17. OBSTRN Obstruction 13
  18. LAKARE 12
  19. BUAARE 10
  20. CBLOHD 10

Nearby Chart Cells

Approach usage band

  1. New Hampshire US4NH1BC - about 13 nm away
  2. New Hampshire US4NH1BE - about 13 nm away
  3. Northern Massachusetts US4MA1ID - about 18 nm away
  4. Maine US4ME1AB - about 18 nm away
  5. Maine US4ME1AC - about 22 nm away
  6. Northern Massachusetts US4MA1IC - about 22 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 Feb 12, 2026 metadata.json