Thought I was doing something wrong!
Actually it is for a live bait tank that sits behind the pods and circulates fresh water to it.
Have a cast net that i can trap a tank full of small baits with a couple of throws and then off to the kelp beds to catch some Yellowtail
OK ,havn't actually caught one yet! but getting close
You can see the tank below. I made it interchangeable with a lockable bin. So installed for fishing and then the bin goes in for cruising for storage,