Returns the current "life" of a unit. Also referred to as "hit points". All units in DCS have a value that defines how much life is left. If this value is less than 1 the unit is considered "dead". Ground and ship units that are on fire and in the process of "cooking off" will return a life value of 0 until the object explodes. Aircraft are more complex due to sub-systems and damage models which will effect the life value.