Why if most of my surveys are marked Full Set = “T.” do I sometimes see a survey marked “Full Set = F.”?

The full set flag tells DigiPro how to process the data. A T value indicates a normal two-pass survey, in which each depth has a 0 reading and a 180 reading). The software then combines the two readings and divides by 2. An F value tells the software that there is only a 0 reading and therefore no combining or dividing takes place.

If you end your normal two-pass survey by choosing “Done,” the flag is set to T. However, if you end your survey by pressing Esc, the flag is set to False, even though all the data are present.