With Leica Viva creeping into hire fleets and companies updating their survey fleet, Viva is becoming more popular. The config difference when working 1-man is that all the ‘clever stuff’ is now on the controller (either the CS10 or CS15). Instead of working in “Terminal Mode”, where the RX is just a remote control, everything is now done on the controller. Data is stored on the CS (CF/SD/internal memory), which mean you must work in “GeoCom-mode” instead of RCS-mode (when the CF-Card was in the instrument). In terms of application programs, all licenses must now be purchased and updated for the CS alone, not for the total station. Importantly, the instrument (TPS1200/TS30 etc) must be on firmware version 7.53 or more, ideally 7.70 onwards for data inter-operability between TS and CS.