Armour is your final line of defence once your shields go down, while you do get
weapons that have an effect on your armour while you still have shields, they
still remain your strongest form of it.
Your current amount of armour is shown in yellow, and the max in white.
Armour upgrades can be purchased from the Equipment Dealer at any station,
remember that the more armour you have on your ship, the more you will have to
pay for an upgrade!