Theoretically yes.
What you need is a file called "Tarball" for each plugin in question.
That file can be used by the "Import" function in plugin manager. (You need to edit your opencpn config file as advised if you click that button)
So, how do you get a tarball?
1. If you have a PC at home where you have updated e.g. the o-charts plugin the tarball used for that is on my Windows located at:
Code:
C:\ProgramData\opencpn\plugins\cache\tarballs
You can copy the file you need to a stick and
import it on the boat's PC. ("o-charts-2.0.25.0_msvc-wx32-10-win32.tar.gz")
2. All tarballs used by the plugin manager are present at "Cloudsmith"
For o-charts you can find it
here.
For Windows you need a file called "o-charts-2.0.25.0-msvc-wx32-10-tarball" use the download button to the right for that file.
For other OS you need to cache the correct tarball to download. You may need some system knowledge to select the correct file.
For other plugins you can go back and find it. Be sure to always use the "Production" version of each plugin.
Good luck