Thanks all, couple of weeks ago when the bite was on in middle harbour I was amongst half a dozen boats catching 1m kingies in 20-25m of water, multiple boats hooked up within meters of each other, nothing would show on my sounder but the downrigger bomb and the bottom, other guys I spoke to were looking at their sounders and marking fish then dropping jigs on them, their screens were lit up with multiple arches/red lines. With so many large kingies amongst us I was very surprised to have my sounder not show anything.
catching Yakkas the bait balls show up very well on my sounder.
Only time I remember marking kingies was at the 12mile in about 110m of water where I saw arches at the bottom, dropped jigs down and caught 2 kings. Perhaps as you said the angle of the cone is the issue? Can this be adjusted?
Cant remember what model they are but here’s a pic I found on my found.
ill try adjusting the surface and bottom depth and see how I go, any other tips would be appreciated
cheers
peter