Compression Module Statistics

Thanks to our proprietary data compression module we substantially decrease the average file size containing NTM's, tracings, blocks and NP's, thus also decreasing communication costs.

Here are some sample statistics of weekly update file size (*) for different onboard chart collections:

1. Chart collection: 273 charts - BA only. NPs: 36.
   Average weekly update: 0,91 MB, maximum weekly update: 1,28 MB.
   
   
2. Chart collection: 1076 charts - BA, JP, US data. NPs: 77.
   Average weekly update: 1,43 MB, maximum weekly update: 2,65 MB.
   
   
3. Chart collection: 667 charts - BA only. NPs: 69.
   Average weekly update: 1,15 MB, maximum weekly update: 1,81 MB.
   
   
4. Chart collection: 1411 charts - BA, US data. NPs: 98.
   Average weekly update: 1,10 MB, maximum weekly update: 1,39 MB.
   
   
5. Chart collection: 690 charts - BA, JP data. NPs: 44.
   Average weekly update: 1,13 MB, maximum weekly update: 1,66 MB.
   
   
6. Chart collection: 328 charts, BA, JP data. NPs: 45.
   Average weekly update: 1,10 MB, maximum weekly update: 2,0 MB.

(*) Note: when sent onboard weekly update file is split as per ship's request, e.g. 250 K, 500 K, etc.