Diving Board vs flatlines

So was out the other day on a close friends boat, fishing all around Nauru. We ended up out around some feeding noddies and he had a winch and dive board and a very experienced halco 190 fire tiger and caught about every little thing.

I was flatline trolling with a rod and reel and he outfished me for 4 hrs.

The end tally was 2 yellowfin, 2 skipjack, a 9kg wahoo and rainbow runner. We lost two to the dolphins and an additional wahoo at the boat. Of the 9 hooked, seven have been on the dive board line. I even tried my halco fire tiger and the fish nevertheless wanted to try to eat his on the dive board. He reckons the board went down about 3m, and the lure about 1m.

So does any person else use dive boards, and if so what ones and what do you operate off them, and what is your set up.

I dislike winches as they are too commercial and unsporting, but they positive help u get the fish in swift to prevent the flipper and shark thiefs. His winch had 200-300lb mono to the dive board (a #9 or #ten Yo-zuri at a guess)then 80lb trace of ~15m from db to the lure.

I hope to get my individual significant dive board and probably rig my rod line off the back by way of a rubberband and retain the dive board on some large mono off a handline.

So…any dive board consumers inclined to share their ideas and insight and rigs???

I have a couple of tiny paravanes but i doubt they would maintain a halco 190 2m diver down.