Why is satellite access on cruise ships so slow?

Episode 1514 (49:58)

Don from San Pedro, CA
Cruise Ship

Ron is going on a cruise soon and he wants to know if the Wi-Fi on the ship will be usable. Leo says it's always slow because satellite connections are slow, with a lot of latency, and on top of that, he'll be sharing bandwidth with 4,000 people. The best he can do is get up in the middle of the night and use it. The worst part is, it's also very expensive. But when he's in port, he'll have access to mobile data.