NOAA S-57 chart cell

Approaches to Chesapeake Bay

US4VA1AH

Usage band
Approach · code 4
Current edition
3.4
Features
341
S-57 layers
26
Published
Apr 10, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
36.90000° N
South
36.60000° N
West
75.60000° W
East
75.30000° W
Center
36.75000° N, 75.45000° W
Bounds area
260 sq nm
Feature density
1.3118 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
13.1
Smallest layer
1
Largest layer
57
Area sq km
892
Features per sq km
0.38245
  1. LIGHTS Light 57
  2. LNDARE Land area 55
  3. LNDMRK 55
  4. SBDARE Seabed area 50
  5. DEPCNT Depth contour 36
  6. DEPARE Depth area 33
  7. SOUNDG Sounding 15
  8. OBSTRN Obstruction 7
  9. CBLSUB 5
  10. CTNARE Caution area 4
  11. M_QUAL Data quality 4
  12. WRECKS Wreck 3
  13. M_NPUB 2
  14. MAGVAR Magnetic variation 2
  15. SEAARE Sea area 2
  16. BOYSPP Special purpose buoy 1
  17. CONZNE 1
  18. COSARE 1
  19. EXEZNE 1
  20. FOGSIG 1

Nearby Chart Cells

Approach usage band

  1. Approaches to Chesapeake Bay US4VA1AI - about 14 nm away
  2. Approaches to Chesapeake Bay US4VA1AG - about 14 nm away
  3. Approaches to Chesapeake Bay US4VA1BH - about 18 nm away
  4. Approaches to Chesapeake Bay US4VA1BI - about 23 nm away
  5. Approaches to Chesapeake Bay US4VA1BG - about 23 nm away
  6. Dam Neck to Currituck Beach Light US4NC32M - about 26 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
3.4 Apr 10, 2026 metadata.json