Navigate the skies, terrain and water, just type random numbers and press calculate for starting to use it and for benifit.

There are three buttons Triangtravel,Shadowlocate, Homingcompass. Press each to go between screens.

Shadow locate just is a walking sundial. Basically use your height, time from home and sun stuff to find the lat long. Just enter the numbers press calculate, see numbers and press maps to see location.

For skies, use the triang travel, enter the destination distance, angle and travel distance. It will tell the reorientation distance.

For Homing compass, enter destination coordinates, starting is at center. Moves x and y. Keep track and come back home.

Credits to Cteam too