Calculate a baseball player's batting average. Calculating a baseball player's batting average is not a difficult task at all. A batting average represents the percentage of at bats that result in hits for a particular baseball player. The formula is: That's all there is to it.
To fly under the radar means to act in a way so as to actively avoid detection. It is the opposite of 'in your face'. There is an element of getting away with something but it is not necessarily bad.
Unmanned aircraft means the flying portion of the system, either fixed-wing or rotary-wing and flown by a ground control system, or autonomously through the use of an on-board computer, communication links, and any additional equipment that is necessary for the âunmanned aircraftâ to operate safely.