I use a GoPro Hero4 Black in Narrow FOV mode on other people's boats, and a Panasonic HC-V750 with a Wakeye WTC tower mount on mine.
Both cameras cost about the same.
The quality of the Panasonic is much better for filming from the distance, it's also less buggy than the GoPro (I went through several due to well documented over heating problems). It's also got WiFi controls via app similar to the GoPro.
Both can do 120 fps at 1080p for smooth slow motion.