Global Satellite TV
Global Satellite TV packages are rarely available in Ku Band due to their regional coverage (and media rights). If you need global satellite TV service then you will need to either find a service which transmits worldwide (most likely in C-Band) but hese solutions require much larger antennas and the services are not as widely spread as the regional Ku Band TV packages.
Satellite TV on Global Vessels
If streaming is not an option, and it usually isn’t on ocean going merchant vessels, then you probably will have to change to another provider depending on the region you will be sailing to. With some preparation you will be able to find some satellites which cover your routes and you can then use their free-to-air or pay-tv packages. Once out of the coverage of one satellite you will however need to switch to the next.