Making your own diving decoy is simple. It’s similar to a jerk string, but easier. First, take a highly visible decoy like a drake bufflehead and affix a small screw eye underneath the bill. Put a dab of epoxy around it as insurance. Tie a piece of tarred decoy line or heavy monofilament to a snap swivel, and attach the swivel to the screw eye. Then run that line back, through an anchor, and to your hide. If you’re hunting from a permanent blind and don’t have to haul it in but once, a cinder block works well. A boat anchor could work if you’re hunting by boat, and if you’re walking in, try a folding kayak anchor. If you are employing a lighter anchor, though, you might have to bury the flukes to counteract the buoyancy of the decoy. Wrap the cord around a piece of scrap wood for storage and to act as a handle when in use.