Normally TWS and AWS will read the same at the dock when you have no movement. Once moving, if the unit has the required components to calculate TRUE wind speed the TZtouch will normally calculate the value itself and turn the data information "Yellow" to reflect it is having to calculate the value since your wind source isn't providing it. I would recommend opening an official support case with your Furuno distributor including all the connected equipment so they can assist you. Since the release in 2012, I haven't seen any TWS and AWS problems relating to the TZT. Normally it is due to not having a required type of data or the unit data sources not properly configured.