NOAA S-57 chart cell

Chesapeake Bay - Sevenfoot Knoll

US5BALBD

Usage band
Harbor · code 5
Current edition
3.5
Features
202
S-57 layers
29
Published
Jul 1, 2025
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
39.22500° N
South
39.15000° N
West
76.42500° W
East
76.35000° W
Center
39.18750° N, 76.38750° W
Bounds area
16 sq nm
Feature density
12.8526 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
7
Smallest layer
1
Largest layer
31
Area sq km
54
Features per sq km
3.74723
  1. DEPARE Depth area 31
  2. SBDARE Seabed area 31
  3. DEPCNT Depth contour 29
  4. LIGHTS Light 20
  5. BOYLAT Lateral buoy 14
  6. SOUNDG Sounding 14
  7. M_QUAL Data quality 9
  8. COALNE Coastline 5
  9. CTNARE Caution area 4
  10. DRGARE 4
  11. M_NPUB 4
  12. SLCONS Shoreline construction 4
  13. WRECKS Wreck 4
  14. DMPGRD 3
  15. LNDARE Land area 3
  16. BCNSPP Special purpose beacon 2
  17. BUISGL 2
  18. C_AGGR 2
  19. FAIRWY Fairway 2
  20. LNDRGN Land region 2

Nearby Chart Cells

Harbor usage band

  1. Chesapeake Bay US5BALBE - about 3 nm away
  2. Baltimore Harbor US5BALBC - about 3 nm away
  3. Chesapeake Bay - Back River, Hawk Cove, and Middle River US5BALCD - about 5 nm away
  4. Chesapeake Bay - Craighill Channel US5BALAD - about 5 nm away
  5. Chesapeake Bay US5BALCE - about 6 nm away
  6. Baltimore Harbor US5BALCC - about 6 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
3.5 Jul 1, 2025 metadata.json