CT-2020 or "Nav" was a Clone Trooper Captain who served under Jedi General Hassel Bondi, and was the senior captain of the well known clone squad the 61st Battle Corps. He was a skilled captain but was killed during a battle on Duro. Nav was a skilled leader who some times put his life before his battle unit. Nav was the very last captain of the 61st Battle Corps. Nav was trained by ARC Trooper 77 "Alpha" on the rainy planet of Kamino during his training days, he was also trained by the bounty hunters. Nav's name was short for 'Navigation'. Which he didn't like but he kept it anyway, because he didn't want to change his name.