I noticed that too. I am sure its just a glitch that will get fixed in the next patch.
Fighters do use up supplies while in space. I recall loosing my only carrier in battle, and all my fighters were stranded. That sucked. They all ran our of supplies and as a result, were picked off by the enemy.
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Creator of the Star Trek Mod - AST Mod - 78 Ship Sets - Conquest Mod - Atrocities Star Wars Mod - Galaxy Reborn Mod - and Subterfuge Mod.