Fishing Boat

Can I use a Car battery for my small fishing boat?
I have a small 12 foot alum fishing boat with a small sonar and a 38# thrust trolling motor. I also have a 1yr old car battery (from a totalled car) available for use.
I know the car battery isn't a marine battery and that there's a reason to use marine over auto batteries for boats, but I won't hurt anything by using the car battery in the boat, will I? (Other than shortening the eventual life of the car battery.)
I look at this different than most. I use a car battery for my boat it is a 16' bass tracker. I use it to start the motor and run the trolling motor, bilge pump, aerators, and fish finder. I have no problem in running it all day. It will drain a car battery but it will also drain a marine battery. It will shorten the life of a car batter but it is warranty for 5 yrs. a marine battery is warranty for one year. My car battery usually last for 3 years doing this and I get a pro rated replacement which ends up in about 1/2 the cost of the battery. A car battery cost about half as much as a marine battery and I only get one year maybe 2 out of the marine battery. Now you do the math on it.
So go ahead and use the car battery, just charge it up each time and enjoy.
SAVAGE SEA - FISHING BOAT IN SEVERE STORM
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