NOAA S-57 chart cell

Alaska

US4AK6AT

Usage band
Approach · code 4
Current edition
1.2
Features
260
S-57 layers
20
Published
Jul 1, 2025
Manifest updated
Jun 22, 2026, 2:51 PM UTC

Coverage

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North
59.70000° N
South
59.40000° N
West
162.60000° W
East
162.00000° W
Center
59.55000° N, 162.30000° W
Bounds area
329 sq nm
Feature density
0.7907 / sq nm

Chart Statistics

20 largest layers shown

Average features per layer
13
Smallest layer
1
Largest layer
66
Area sq km
1,128
Features per sq km
0.23052
  1. SBDARE Seabed area 66
  2. DEPARE Depth area 62
  3. DEPCNT Depth contour 60
  4. M_QUAL Data quality 32
  5. SOUNDG Sounding 6
  6. CTNARE Caution area 5
  7. SEAARE Sea area 4
  8. UNSARE 4
  9. BOYLAT Lateral buoy 3
  10. CBLSUB 3
  11. SNDWAV 3
  12. ADMARE 2
  13. MAGVAR Magnetic variation 2
  14. WATTUR 2
  15. CONZNE 1
  16. EXEZNE 1
  17. M_COVR Coverage 1
  18. M_NPUB 1
  19. M_NSYS 1
  20. TESARE 1

Nearby Chart Cells

Approach usage band

  1. Alaska US4AK3ZP - about 18 nm away
  2. Kuskokwim Bay to Bethel, Alaska US4AK6BT - about 18 nm away
  3. Alaska US4AK6AS - about 18 nm away
  4. Alaska US4AK6AU - about 18 nm away
  5. Kuskokwim Bay to Bethel, Alaska US4AK6BS - about 26 nm away
  6. Kuskokwim Bay to Bethel, Alaska US4AK6BU - about 26 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
1.2 Jul 1, 2025 metadata.json