I am not an internet tech. nor I.T. trained. I like the ocean; have been a passenger on ~ 35 ocean cruises. I am not a travel agent. I keep reasonably informed (I believe). You may wish to follow along my thoughts, ideas I share here after my own research; partly my own personal opinions & conclusions. Your own thinking & conclusions are also necessary. Hopefully I can save you some time by sending some of your thoughts in helpful directions & towards useful questions.
If it’s one of your important goals to experience Starlink Maritime service speeds during your cruise, then before booking on a ship I strongly suggest that you should double check (ask the cruise line directly and/or ask them via your cruise booking agent) your specific questions. E.g.: whether your intended ship has Starlink service, & whether it is functioning well on that ship & on your intended itinerary route.
– Internet speed tests on different cruise lines scored “most consistently in 3-5 Mbps range”, & ranged up to “60 Mbps speed”.
– Since introduction of Starlink services: “speeds do seem to be trending upward”.
– VPNs “don’t always work” on board & there may be some content filtering (e.g. blocking of “adult themes” websites).
– Unless cruising on NCL (& with a top-tier premium package) “you should just assume you can’t access with a VPN”.
– Many cruise lines offer different levels of Internet under various names, e.g. “Social, Basic, Premium” service levels.
– Many cruise lines have intenet prices that vary based on level of service, & may charge in the $20-$30/day range (for one device). Though some cruise lines have periodic promotions, when internet might be “included” (= no extra charge).
– “Caribbean, Bahamas, Mediterranean” itineraries: some of the fasted speeds; “passengers sailing in the Caribbean have reported speeds as high as 50 to 100 Mbps”.
– Alaska itineraries have tended to slower internet connections. Though some said: now with “Starlink … WiFi speeds on Celebrity Cruises [can be] exceptionally fast”, as they “could stream Netflix, Amazon Prime, & Disney Plus from [their] balcony in Alaska”.