Backbone tie lines (IMAGE) DOE/Pacific Northwest National Laboratory Caption In their investigation of the economic benefits of offshore wind, researchers looked at two different ways that the generated power could be delivered to shore. One structure is called a backbone, in which the wind farms (represented by a single wind turbine in the above image) are connected to each other, then connected to shore at fewer points. Credit Stephanie King for Pacific Northwest National Laboratory Usage Restrictions No restrictions. License Public Domain Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.