8. The method of claim 7 , wherein the plurality of candidate target types comprises an unknown large target type and an unknown small target type.
8. The method of claim 7 , wherein the plurality of candidate target types comprises an unknown large target type and an unknown small target type. 9. The method of claim 8 , wherein the unknown large target type includes targets with an estimated length exceeding a length of a largest known target type by 30 feet.