How about a better explaination or a better pic for us guys who ain't never heard of a drowning stick before?
There are several Posts in the Archives I suspect but I have some more pictures. This is the top end of my rod. My simple lock slides over the loop at the top of this drowning rod. Once I slide the trap over the loop the T-stake will fasten the top end of the rod to the bank.
That is the standard chain on a MB-750 with the simple lock added. I prefer to paint my locks a bright color so I can glance at a set and see if the lock is gone. Saves feeling around in murky water risking my fingers !

I run mostly 8' rods and there is a 1/2 nut welded about 8" from the bottom of the rod. This stops the trap from sliding clean off the rod. That end of the rod is just stuck into the creek bottom so there is no chance the Beaver can swivel the rod to shore.
I recommend 1/2" rod as it takes way more abuse. I will bend the rod slightly putting an arc in the rod if the creek bottom warrants this. You want the lock to slide effortlessly down the rod and not have to plow dirt on the way down.