Robuta

https://scholars.unh.edu/ccom/429/ "Portable Piloting Units (PPUs): Current Use, Future Trends" by Lee Alexander By Lee Alexander, Published on 05/01/08 current use future trends portable piloting units https://scholars.unh.edu/ccom/441/ "e-Navigation, ECDIS and PPUs: Challenges and Opportunities" by Lee Alexander By Lee Alexander, Published on 01/01/08 e navigation ppus https://scholars.unh.edu/ccom/435/ "Use of Portable Piloting Units (PPUs) by Maritime Pilots: Study Findin" by Lee Alexander By Lee Alexander, Published on 01/01/08