My cousin and I were in Ft. Lauderdale Florida in Feb. and came across these at the Bass Pro Shop there. He said he uses them for Marlin, Tuna and Sailfish trolling. He's got a Luhrs 32' offshore boat and does the Bluefin and Marlin tournaments on the east coast. Those are real spendy! He says they work well ! He's moving to Ft Pierce and will be fishing with him when he's settled in.