We are navigating with Dead Reckoning, so you will need a stopwatch to time your legs. If you don’t have one handy, MSFS provides one for you.
From the floating menu, select the NavLog option.
This provides a handy stopwatch for timing your legs.
CinnamonInk8010Event Organizer
For those of you interested in using the JP Logistics Mod for the C152, you can get it here: JPLogistics C152 Enhancement Mod » Microsoft Flight Simulator