Infinite exploration by the main ship

After explored all sites on the map, the ship can go on infinite exploring the world. The ship can bring anything worth back by your selection(from crude oil to advanced electronic IV). The amount and quality of rewards is determined by the difficulty of the exploration. The more difficult the exploration is, the more resource you will cost, and the more the enemy will be.
To support these farther exploration, there are infinite research for the main ship to strengthen its fuel tank and fire power.
Also some kind of resources is needed. Besides fuel, the ship needs food packs, fresh water, mechanical parts, medical supplies and ammunition(if there is related industry)

A great Idea to go on Quests. Everyone likes quests.