Image from Google Jackets

Heavenly helpers.

By: Series: Construction News ; (6633) 16 September 1999, 26(1)Publication details: 1999Subject(s): Summary: Explains how the Global Positioning System (GPS) is being used to maintain accuracy on the Channel Tunnel Rail Link project.

Explains how the Global Positioning System (GPS) is being used to maintain accuracy on the Channel Tunnel Rail Link project.