As I am still not able to understand the way S9b works with the laps data in different modes I made a series of tests (trail running) over the same route. Here you have: MODE PERFORMANCE - NAVIGATOR SCREEN OFF § https://www.suunto.com/en-be/move/davidzuelballester/60bb0e0f9859195d40b93320 MODE ENDURANCE - NAVIGATOR SCREEN ON (E-ON) https://www.suunto.com/move/davidzuelballester/60cd9fb2852b3c080621258a MODE ENDURANCE - NAVIGATOR SCREEN OFF (E-OFF) https://www.suunto.com/en-be/move/davidzuelballester/6097121145cefd139a2aaa00 Looking at the maps, neither reading E-ON or E-OFF matches reading P. Whilst E-ON guidance was completely correct, the route recorded is significantly less accurate than reading P. Looking at the total distances: The actual distance is 13.9 kms P recorded distance is 13.87 kms, last split ends at 13.9 Km, so is coherent. E-ON recorded distance is 14.8 kms, last split ends at 13.3 kms (why is that?) E-OFF recorded distance is 14.55 kms, last split ends at 14.4 kms (why is that?) Moreover I don’t get the actual difference between split duration and split min/km. In P these readings are different although though, but in E-ON and E-OFF, these readings are far one to the other.