As soon as you can build a air unit, any unit amd tell it to explore it will fly away and stop when it stops keep pressing / to explore
do this until your fuel goes to 0 then press / again your fuel will go back to 10 this way you can explore the map much quicker and faster and your air unit does not need to stop at a base!!!!!!!!!
if you have any questions or want tips e-mail me at Artemis40000@aol.com