NOAA S-57 chart cell

Saint Marys River

US4MI2QU

Usage band
Approach · code 4
Current edition
3.7
Features
533
S-57 layers
50
Published
Feb 9, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
46.80000° N
South
46.50000° N
West
84.60000° W
East
84.30000° W
Center
46.65000° N, 84.45000° W
Bounds area
223 sq nm
Feature density
2.3932 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
10.7
Smallest layer
1
Largest layer
101
Area sq km
764
Features per sq km
0.69776
  1. DEPARE Depth area 101
  2. DEPCNT Depth contour 91
  3. COALNE Coastline 33
  4. OBSTRN Obstruction 31
  5. LIGHTS Light 30
  6. SLCONS Shoreline construction 25
  7. LNDMRK 19
  8. M_QUAL Data quality 18
  9. BCNSPP Special purpose beacon 15
  10. DRGARE 13
  11. RIVERS River 13
  12. UWTROC Underwater rock 13
  13. BOYLAT Lateral buoy 12
  14. BRIDGE 12
  15. LNDARE Land area 11
  16. SEAARE Sea area 11
  17. GATCON 10
  18. BUAARE 8
  19. DAYMAR 5
  20. SBDARE Seabed area 5

Nearby Chart Cells

Approach usage band

  1. Saint Marys River US4MI2QV - about 12 nm away
  2. Lake Superior US4MI2QT - about 12 nm away
  3. Saint Marys River US4MI1PE - about 18 nm away
  4. Lake Superior US4MI2RT - about 22 nm away
  5. Saint Marys River US4MI1PF - about 22 nm away
  6. Lake Superior US4MI1PD - 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
3.7 Feb 9, 2026 metadata.json