The first thought that runs through my head is how much impact/vibration can an ipad take? (I ask because I honestly don't know).
That GPS/fishfinder is designed to take quite a bit of physical punishment from normal boat operations.
"Decency is not news; it is buried in the obituaries --but it is a force stronger than crime" ~ Robert A. Heinlein, 1952
I can't give legal advice yet, but this site may have some of the answers you need: https://texaslawhelp.org/