The Big Tuna is plenty large enough for a small platform to house electronics, tools, tackle boxes, etc. Why not a milk crate?! I’ve mounted the Lowrance Elite 4 HDI. Next up is a waterproof battery box with a lithium blue brick rechargeable battery. Technology rocks! The PVC Yak Rack – built to act as a rod carrier and trolling mount. Can also be used to mount cameras, flags and lights. The best part… this rack allows me to keep my cooler well open for… a cooler! And not a milk crate with rod holders/gear.