Besides planer boards, they also use dipseys, lead core and single strand wire line. The idea is to cover as much area and depth as possible. I've been on a boat on Lake Ontario with 16 rods out. When you hit a fish, you can't possibly clear the gear. Don't forget they all use level winds, so you can reel forever if the drag is soft. This would never work with single action mooching reels. The limit is 5 per day, and guest on charters expect nothing less.
No hali or Lings!!
Only silvers and kings.
Be happy we are here on the coast.
Stosh