The TripLog data is shown in one of the digital readout boxes on the right side of the 800/900 series units and on the bottom of the display of the 1100 series units. By default it is not on so you have to go into the Set-up menu tab and select it in the Select Readouts menu. You will have to reset it each time that you intend to use it or it will continue to accumulate data from your previous trip(s).