I have a 23 year old Aqua VU.. It still works great. I use it to find gear people lose overboard and to examine certain rock piles.
But…. I got more use out of it 20 years ago when daughter, husband and infant son moved in with us while they were in the process of moving to town. We used it as a baby monitor! Yep put that thing on a dresser and watch the little guy sleep…