I don't leave my units on the boat even as its parked in my driveway. I have a 899 and a Helix 9 G2N. They are in the double pelican cases. I have used them for storing two 700 series perfectly. Strong, have removal foam, latches that snap shut, they are strong cases. I know that they make even better ones, but these have proven to be the best for not spending a lot of money.