Missouri used to prohibit the use of radios to assist in taking deer, but not seeing anything in this years regulations about it. I'll have to check and see if that has changed.
We carry radios with us, not to help each other shoot deer, but as a safety precaution, and to let each other know when someone leaves the field to head back to the barn.
“There are two spiritual dangers in not owning a farm. One is the danger of supposing that breakfast comes from the grocery, and the other that heat comes from the furnace.”