The Third mission for Captains is Journey and Exploration of New Distant Asteroids.
These asteroids have lots of GRVX, however, long flights require much fuel that takes up most of the cargo bay area.
Only rank III Captains can go on this mission. This mission grants Captains rank IV and teaches Captains to send ships to long distances and get them back with GRVX reward.
Certain Captains could fly on this mission only on certain ship types.
After a Captain gets rank IV, his ability to mine will increase according to his rarity.