I learned this from a guide at Nootka. Fill your chum bag day before at fish cleaning tables. When you get to your Hali spot tie the bag about 10 feet up on your anchor line. Your boat will always drift down current of your anchor line. The scent trail will be under your boat. I usually wait 10 minutes or so whatever it takes to prepare tackle and bait rods. Never put it on your downrigger you are just asking for a huge tangle here with your lines. This is leagal I have checked. I have had great sucess with this. Just my opiion but the more bait and smell in the water the better the halibut and cod fishing. Good luck.