When fishing in places like the Rangitoto Channel, Tauranga Harbour or any harbour with strong currents, the bigger snapper hang back from the boat. You will always hook small fish under the boat, as they are more competitive and will attack baits aggressively.
To target the large fish, you have to get your bait well back in the current. This can be done by casting the bait, or by free-spooling the reel and letting the current carry your terminal gear away from the boat.
A new technique has been developed, which works effectively, and consistently catches fish. It is a mini long-line that is connected to a rod and we have been using it for years. On one trip with a large group of rugby players, the boys at the back were hooking small snapper continuously.
The boat was anchored off Kauri Point, above the Harbour Bridge, and there was a good current on the incoming tide. So we tied a rag with a small sinker added on the end of the mini long-line and fed it down the current. The 50m backbone is set up like any long-line, with stops every couple of metres, and we clipped on short traces with chunks of fresh mullet on the small, square hooks. Fresh bait is always better on this system, as soft baits like pilchard would be quickly stripped by small fish. With 10 traces attached, the main line was clipped to a 15kg braid line and a large sinker added, and the whole lot dropped down the current until it hit the bottom. Then it was just a question of waiting for about 20 minutes and the rod nodded as another fish hooked up
It is pretty exciting when you wind in the line, and the main line is unclipped from the rod and fed on to a plastic hand spool and the traces are unclipped as they come aboard. That one set of the mini long-line yielded eight keeper snapper and, when you realise that the total catch for the day was 23 snapper, its effectiveness is clear. The system targets fish well away from the boat, and just needs a good current to make it work. The rod-based long-line can be found on the GT tackle website, and it just needs a strong rod to attach it to. Any old rod works, and braid line is better than monofilament as its thinner diameter cuts through the current, and it has no stretch.