Hi Guys thanks for your interest in this topic, the NT sure is a magical place with wonderfull scenery and excitement around each corner.
The lucky lure of choice in this situation was No.3,
The Classic 120 Barra +5 Lure Ghost Bannafish.
Rig used
Rod: Daiwa TD Black Beefstick 1.83m 10-28g line 6-12kg.
Reel: Daiwa Baitcaster TD Barra FOW 10, 40 pound Siglon 8 braid, 60 pound Pink Black magic leader.
My reason for choosing this lure was purely the clarity and depth of water.
The tide was a medium neap and had turned at this stage from high about 1 hour into the low averaging 2.5m-3.5m, my trolling line was 1km out from the mouth and back, the water clarity was good to medium.
In this situation the Barra are starting to head into the river system from offshore, keen to feed on baits as the tide recedes out of all the feeder creeks (run off).
Barra have eyes on top of their heads and tend to sit on the bottom or around snags looking to ambush prey, or kick their tails up and forage in the mud etc.
The classic 120 I used is a +5, 5 meter trolling depth, as 61 crusher mentioned, I am going to adjust my trolling speed, rod angle and length of line to bounce this lure off the bottom, back up then back in the sand/ mud again.
As the water clarity was so clear and shallow both bait and Barra are spooked easily, so an approach to put it straight on their nose with puffs of mud was the go, not making them chase something higher in the water column.
cheers Guys.