Even if you assume he left from key west, that’s still a two hour ride over fairly open water. And this is ignoring the possibility of sargassum between key west and cuba.
They make large jetski for cruising. I’ve seen one 18’ long that a couple were taking on a couple week tour. They’d camp on a beach if they didn’t make it to a marina. It was boat you sat on top instead of in. Seemed pretty silly to me, but adventurous.
Still slow and 18’ is not much better and probably slower.
Sounds like you’re a real salty dog. I guess slow is relative. Jetski’s are definitely slower than an airplane and at 7 knots a sailboat is way faster than a toddler can crawl.
I’ve hit 70 on a jet ski and it was fucking terrifying
I’ve been 8 knots on a sailboat (9ish mph, 15ish kph) and been terrified. Being on the water is different.