The owner of a 40-foot Silverton owes his life to the fast thinking of Captain Lee Hartman, who drives a TowBoatUS vessel out of Black Point Marina south of Miami. We know that Hartman definitely saved the owner from drowning; he probably saved the man from being attacked by the saltwater crocodiles who live there. Hartman was just honored at the annual BoatUS Towing Conference in Arlington, Virginia. He happened to be in the right place at the right time, but his refusal to give up saved the owner’s life. Black Point Marina is the largest public marina in Miami.…