An instrumented navigation system for aiding a towboat and barge configuration in the entry and traversal of a lock located on a waterway or for navigation around other structures, such as bridge piers or docks. The system consists of wirelessly linked computers on the towboat and the lock which display...http://www.google.de/patents/US7280914?utm_source=gb-gplus-sharePatent US7280914 - Instrumented lock entry and traversing system
