NOAA ENC Group Categories
Starpath online course on Electronic Chart Navigation

Although it is often simplest to just download charts by state, there are packaged groups available, which can be useful and reduce duplicating the small-scale coastal charts that are reproduced in adjacent states. See download options at starpath.com/getcharts. This table is valuable when you are using auto or manual download from within in a Nav app that offers these options but does not define the regions, such as qtVlm and Time Zero.

NOAA Regions Name No. of ENC File size MB (zipped)
2 Block Island, RI to the Canadian Border 391 67
3 New York to Nantucket and Cape May, New Jersey 623 57
4 Chesapeake and Delaware Bays 325 58
6 Norfolk, VA to Florida - The Intracoastal Waterway 259 52
7 Florida East Coast and the Keys 184 28
8 Florida West Coast and the Keys 318 35
10 Puerto Rico and US Virgin Islands 78 17
12 Southern California - Point Arena to Mexican Border 64 30
13 Lake Michigan 126 14
14 San Francisco to Cape Flattery 90 37
15 Pacific NorthWest - Puget Sound to Canadian Border 103 29
17 Mobile, AL to Mexican Border 490 73
22 Lake Superior and Lake Huron 211 22
24 Lake Erie (US Waters) 78 12
26 Lake Ontario (US Waters) 48 7
30 Southeast Alaska 144 74
32 South Central Alaska 164 49
34 Alaska - The Aleutians and Bristol Bay 281 62
36 Alaska - Norton Sound to Beaufort Sea 269 21
40 Hawaiian Islands 213 30
 
USCG Districts Coverage (map) No. of ENC File size MB (zipped)
 1 ME to NJ 795 100
  5 DE to NC 438 81
  7 SC to E. FL 606 85
  8 TX to W. FL 566 80
  9 Great Lakes 518 53
11 CA 78 34
13 WA and OR 149 44
14 HI 231 35
17 AK 840 197
       
ALL ALL NOAA ENC 4,188 725
 

All NOAA ENC unzipped = 2 GB
Average size zipped = 173 kB
Average size unzipped = 0.46 MB
Note SENC copy doubles size stored on HD