They are uncapped as far as I could find, but I didn’t read the fine print or anything.
On the 4 or so companies I checked, most were metered as you said but also clearly designed for personal vessels. They were also expensive as you said; I think the cheapest I saw was ~$1500/month for 5GB, and $0.39/MB for overages.
I am in no way an expert, this is just based off like 4 links. Someone said Inmarsat had more commercial-vessel sized plans so I checked them out, and they do seem way cheaper if you’re planning to use the link a lot.
On the 4 or so companies I checked, most were metered as you said but also clearly designed for personal vessels. They were also expensive as you said; I think the cheapest I saw was ~$1500/month for 5GB, and $0.39/MB for overages.
I am in no way an expert, this is just based off like 4 links. Someone said Inmarsat had more commercial-vessel sized plans so I checked them out, and they do seem way cheaper if you’re planning to use the link a lot.