Icom IC-R8600 Dial A, B & C: What do they do?

One of the most striking things when you first see an Icom IC-R8600 is that the rotary encoders don't have names - they are simply labelled 'A, B & C'. We cover off what they do, and why it doesn't really matter :) 73, Jarrad VK3BL & the Rate My Radio Team