The nation’s first all-electric tug boat has docked at the Port of San Diego and expects to begin emissions-free operations in about a month.Operated by Crowley Maritime Corporation, the 82-foot eWolf will escort ships entering and leaving the Tenth Avenue Marine Terminal using electric power instead of diesel fuel, helping slash greenhouse gas emissions at the port and its neighbors in Barrio Logan and National City. For the record: 1:58 p.m. March 13, 2024This story has been updated to show th...