Am inquiring as to the proper gauge wiring that would be needed to handle 2 humminbird units, 798 and 998, 2 other humminbird 788 and 1198. They will be wired direct to the battery running from the stern of the boat to the bow( 2 units ), and from the stern to the steering console ( 2 units ) in separate runs to each location. They will be fused but not sure on amperage to use thinking 3 or 5 amp. Was thinking 16ga wire would handle it but wanted some input. The manual says 18ga and 3 amp, but I am running 2 units and the distance in an 18 foot boat was wondering if the heavier wire would be a better choice. Thanks for the help. TR.