NOAA S-57 chart cell

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

US4MI1OF

Usage band
Approach · code 4
Current edition
1.3
Features
1,433
S-57 layers
44
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
84.30000° W
East
84.00000° W
Center
46.05000° N, 84.15000° W
Bounds area
225 sq nm
Feature density
6.3641 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
32.6
Smallest layer
1
Largest layer
307
Area sq km
772
Features per sq km
1.85547
  1. DEPCNT Depth contour 307
  2. DEPARE Depth area 263
  3. UWTROC Underwater rock 148
  4. COALNE Coastline 145
  5. OBSTRN Obstruction 82
  6. LNDARE Land area 79
  7. LNDRGN Land region 75
  8. BOYLAT Lateral buoy 48
  9. WEDKLP 44
  10. SBDARE Seabed area 42
  11. LIGHTS Light 37
  12. RIVERS River 24
  13. SEAARE Sea area 18
  14. M_QUAL Data quality 17
  15. SOUNDG Sounding 12
  16. SLCONS Shoreline construction 11
  17. CTRPNT 7
  18. BCNSPP Special purpose beacon 6
  19. DAYMAR 6
  20. DRGARE 5

Nearby Chart Cells

Approach usage band

  1. Lake Huron - Saint Martin Bay to Marquette Island, MI US4MI1OE - about 13 nm away
  2. Lake Huron - Entrance to Saint Mary's River, Drummond Island, MI US4MI1OG - about 13 nm away
  3. Lake Huron - Forty Mile Point to Adams Point, MI US4MI1NF - about 18 nm away
  4. Saint Marys River US4MI1PF - about 18 nm away
  5. Saint Marys River US4MI1PE - about 22 nm away
  6. Lake Huron - Straits of Mackinac to Cheboygan River, MI US4MI1NE - 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
1.3 Jun 11, 2026 metadata.json