You may want to hold off buying your next electronics until you see this. The voted the best 2017, from Power Ray/Vision submersible fishing drone, that has a light, sonar or live feed, dives down past 100 feet, 4 hours running time, will even catch fish or carry your line bait to the fish while you control the drone coming out 2-27-17, check it out.
https://www.youtube.com/watch?v=Pi6AEWwvN48