The Tigress Rod Rigger uses a gunwale mounted rod holder to provide additional rods to your trolling rod spread.
Tigress Stainless Steel Rod Rigger
Outrigger Free: Old School Trolling Tactics - The Fisherman
Lee's Flush Mount 0 Degree Medium Rod Holders - Capt. Harry's Fishing Supply
Tigress Offset Triple Rod Holder w/Cup Holders - Port Side & Starboard Side - Polished Aluminum
TIGRESS STAINLESS STEEL TROLLING ROD HOLDER ROD RIGGER
18' Deluxe Outrigger Collapsible Hybrid Pair
Outrigger Free: Old School Trolling Tactics - The Fisherman
Gemlux 105544 Coastal Stamped Rod Holder - 30 Degree - TackleDirect
Rod Holders & Accessories - CHAOS Fishing
Swivel Rod Holders