The Massachusetts Port Authority recently welcomed the arrival of its two low-profile and four RTG cranes acquired from the Port of Oakland. The cranes fulfill an essential component of Massport’s modernization strategic plan for growth and greater economic benefit, and will bring enhanced efficiency at Conley Container Terminal in South Boston. The low-profile style is needed because the terminal is under the flight path of a runway at Boston Logan International Airport. The 6,300-mile journey took about six weeks.