NOAA S-57 chart cell

North Atlantic Ocean and Back Bay

US4VA1AF

Usage band
Approach · code 4
Current edition
1.5
Features
1,214
S-57 layers
47
Published
May 15, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

Loading map
North
36.90000° N
South
36.60000° N
West
76.20000° W
East
75.90000° W
Center
36.75000° N, 76.05000° W
Bounds area
260 sq nm
Feature density
4.67 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
25.8
Smallest layer
1
Largest layer
304
Area sq km
892
Features per sq km
1.36156
  1. COALNE Coastline 304
  2. LNDRGN Land region 184
  3. LNDARE Land area 152
  4. RIVERS River 137
  5. SLCONS Shoreline construction 96
  6. OFSPLF 50
  7. LAKARE 28
  8. SEAARE Sea area 27
  9. DEPARE Depth area 25
  10. SBDARE Seabed area 22
  11. M_QUAL Data quality 19
  12. BUISGL 16
  13. SOUNDG Sounding 16
  14. DEPCNT Depth contour 15
  15. BRIDGE 14
  16. CTNARE Caution area 10
  17. OBSTRN Obstruction 10
  18. BUAARE 9
  19. LIGHTS Light 8
  20. LNDMRK 8

Nearby Chart Cells

Approach usage band

  1. Dam Neck to Currituck Beach Light US4NC32M - about 10 nm away
  2. Elizabeth River to the Atlantic Intracoastal Waterway and the Great Dismal Swamp Canal US4VA1AE - about 14 nm away
  3. Approaches to Chesapeake Bay US4VA1AG - about 14 nm away
  4. Chesapeake Bay Entrance US4VA1BF - about 18 nm away
  5. Chesapeake Bay - Hampton Roads to Poquoson River US4VA1BE - about 23 nm away
  6. Approaches to Chesapeake Bay US4VA1BG - 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
1.5 May 15, 2026 metadata.json