NOAA S-57 chart cell

Approaches to Chesapeake Bay

US4VA1BI

Usage band
Approach · code 4
Current edition
1.18
Features
148
S-57 layers
21
Published
Mar 24, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
37.20000° N
South
36.90000° N
West
75.30000° W
East
75.00000° W
Center
37.05000° N, 75.15000° W
Bounds area
259 sq nm
Feature density
0.5716 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
7
Smallest layer
1
Largest layer
31
Area sq km
888
Features per sq km
0.16664
  1. LIGHTS Light 31
  2. LNDARE Land area 29
  3. LNDMRK 29
  4. SBDARE Seabed area 20
  5. M_QUAL Data quality 9
  6. SOUNDG Sounding 6
  7. DEPARE Depth area 4
  8. DEPCNT Depth contour 3
  9. CTNARE Caution area 2
  10. M_NPUB 2
  11. SEAARE Sea area 2
  12. WRECKS Wreck 2
  13. BOYSPP Special purpose buoy 1
  14. CONZNE 1
  15. COSARE 1
  16. DMPGRD 1
  17. EXEZNE 1
  18. M_COVR Coverage 1
  19. M_NSYS 1
  20. MAGVAR Magnetic variation 1

Nearby Chart Cells

Approach usage band

  1. Approaches to Chesapeake Bay US4VA1BH - about 14 nm away
  2. Approaches to Chesapeake Bay US4VA1BJ - about 14 nm away
  3. Approaches to Chesapeake Bay US4VA1AI - about 18 nm away
  4. North Atlantic Ocean US4VA1CI - about 18 nm away
  5. Approaches to Quinby and Great Machipongo Inlets US4VA1CH - about 23 nm away
  6. North Atlantic Ocean US4VA1CJ - 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
1.18 Mar 24, 2026 metadata.json