NOAA S-57 chart cell

Lake Huron - Entrance to Saint Mary's River, Drummond Island, MI

US4MI1OG

Usage band
Approach · code 4
Current edition
1.5
Features
1,541
S-57 layers
49
Published
Jun 11, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
46.20000° N
South
45.90000° N
West
84.00000° W
East
83.70000° W
Center
46.05000° N, 83.85000° W
Bounds area
225 sq nm
Feature density
6.8437 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
31.4
Smallest layer
1
Largest layer
389
Area sq km
772
Features per sq km
1.99531
  1. DEPCNT Depth contour 389
  2. DEPARE Depth area 313
  3. UWTROC Underwater rock 171
  4. LNDARE Land area 116
  5. COALNE Coastline 111
  6. OBSTRN Obstruction 106
  7. RIVERS River 36
  8. SBDARE Seabed area 28
  9. FSHFAC 23
  10. LIGHTS Light 22
  11. LNDRGN Land region 22
  12. SEAARE Sea area 22
  13. BOYLAT Lateral buoy 21
  14. CBLSUB 21
  15. LAKARE 18
  16. SLCONS Shoreline construction 17
  17. CTRPNT 16
  18. DAYMAR 8
  19. M_QUAL Data quality 8
  20. SOUNDG Sounding 8

Nearby Chart Cells

Approach usage band

  1. Lake Huron - North Channel, Drummond Island, MI US4MI1OH - about 13 nm away
  2. Lake Huron - Saint Mary's River, Entrance to Munuscong Lake, MI US4MI1OF - about 13 nm away
  3. Lake Huron - Spectacle Reef and Raynolds Reef, MI US4MI1NG - about 18 nm away
  4. Saint Marys River US4MI1PF - about 22 nm away
  5. Lake Huron - North East of Rogers City, MI US4MI1NH - about 22 nm away
  6. Lake Huron - Forty Mile Point to Adams Point, MI US4MI1NF - 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
1.5 Jun 11, 2026 metadata.json