 There are also many variations on themes.The smaller combat surveillance UAVs, in the size range of a large hobbyist RC model plane and used to support military forces at the brigade or battalion level, are sometimes called "mini-UAVs", and their low cost makes them particularly suitable for "expendable" missions.Such expendable missions might involve carrying a jammer payload into an enemy's operational area to disrupt radar and communications, or even being fitted with a radar seeker and a warhead to attack enemy radars.