You could use a weight forward spinner(erie deerie) along the bottom.. But normally you would use them to target suspended fish on a count and swing approuch.. if your boat drifts sideways in the waves you would cast your line out to the back of your boat and as soon as it hits the water you take your slack out of the line and count.. one thousand one, one thousand two, ect.. where ever you mark fish at.. If the fish are suspended at 15 ft. a erie deerie drops somewhere about one and a half feet per second.. I usually start 3 foot above the fish and work my way to them.. so if they where at 15 foot I would do a 8 count.. Alot of them time they hit on the way down be ready.. if not slow reel in to the boat and retry.. remember your last count and dupplicate your last cast over and over again.. good luck..