Thread: Spider Riggers

My two units are networked. 12" Touch at dash and a 9" Touch up front. I just set my front unit to read the ducer on the rear of the boat when trolling. It works great that way cause the fish you see on the TM ducer have already been fished anyway. When single poling brush, or trolling cover, I switch the source unit back to the front TM ducer and add 1.5.

I thought the keel offset subtracted the offset number from the surface down to allow for the depth of your keel when running a sail boat, or a high draft boat like a loaded barge on the river etc. if it ADDED the depth of the offset to the water depth, you would run aground with your keel. Hmmmm.


Big River Marine
Bill Burnett
870-635-0202
Xpress, Excel, Alweld Boats. Yamaha, Evinrude, Nissan, and Mud Buddy Engines.