NOAA S-57 chart cell

Frederick Sound and Stephens Passage;Holkham Bay;Big Castle Island

US3AK3UM

Usage band
Coastal · code 3
Current edition
14.3
Features
5,694
S-57 layers
52
Published
Mar 13, 2026
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
57.89583° N
South
56.58376° N
West
134.41184° W
East
131.47554° W
Center
57.23980° N, 132.94369° W
Bounds area
7,515 sq nm
Feature density
0.7577 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
109.5
Smallest layer
1
Largest layer
1,206
Area sq km
25,776
Features per sq km
0.2209
  1. UWTROC Underwater rock 1,206
  2. COALNE Coastline 1,010
  3. LNDARE Land area 652
  4. DEPCNT Depth contour 645
  5. DEPARE Depth area 591
  6. RIVERS River 298
  7. SBDARE Seabed area 262
  8. SLOGRD 235
  9. LNDELV 228
  10. OBSTRN Obstruction 107
  11. LNDRGN Land region 75
  12. SEAARE Sea area 63
  13. M_QUAL Data quality 55
  14. LIGHTS Light 42
  15. DAYMAR 38
  16. SLCONS Shoreline construction 29
  17. BCNSPP Special purpose beacon 27
  18. SOUNDG Sounding 15
  19. WEDKLP 13
  20. BCNLAT Lateral beacon 12

Nearby Chart Cells

Coastal usage band

  1. Frederick Sound, AK US3AK1FX - about 17 nm away
  2. Stephens Passage, AK US3AK1GX - about 58 nm away
  3. Sumner Strait, Clarance Strait and the Inside Passage US3AK3CM - about 62 nm away
  4. Point Woodhouse to Lisianski Strait US3AK3BM - about 79 nm away
  5. Cape Bartolome to Cape Decison, AK US3AK1EX - about 87 nm away
  6. Sitka Sound, AK US3AK1FW - about 88 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
14.3 Mar 13, 2026 metadata.json