At this point, the rod and reel should already be rigged with the leader and circle hook already attached. If I am blue marlin fishing, I generally will use 300- or 400-pound-test leader. With a snap swivel at the end of my double line, I’ll use 29 feet of leader. But if we’re using a wind-on leader of 22 feet, then I’ll use 7 feet of leader crimped to a barrel swivel, not a snap swivel. I use a 22-inch piece of 130-pound-test Dacron line, doubled with a double-overhand knot to make a loop that is secured to the hook with a cat’s paw knot and a half hitch. I use a split-eye needle connected to the Dacron (if a split-eye needle is not available, you can use a standard closed-eye needle with a short bit of floss attached to the Dacron loop with a slipknot for easy removal once it’s through the bait’s eye socket).