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Philip A. McGillivary, US Coast Guard PACAREA, Alameda, CA Dr. McGillivary coordinates science for the US Coast Guard PaciÞ c com- mand and US icebreakers. He previ- ously worked in the OfÞ ce of Secretary of Defense after post-docs with NOAA and the Naval Postgraduate School in Monterey, California, and at the Univer- sity of California, Santa Barbara. His University of Georgia PhD dissertation in Ecology on the Gulf Stream followed employment at NOAAÕs Miami, Florida Atlantic Oceanographic & Meteorologi-cal Labs.Email: [email protected] João Borges de Sousa, Dept. Electrical & Computer Engi-neering, Univ. Porto, Portugal Jo?o Borges de Sousa is with the De- partment of Electrical and Computer Engineering at Porto University in Por- tugal where he is also the head of the Underwater Systems and Technologies Laboratory. His research interests in- clude unmanned vehicles, control ar- chitectures, control and coordination He has authored more than 200 publica-tions, including 20 journal papers.Email: [email protected] Ricardo Martins, Underwater Systems & Technology Lab, Univ. Porto, Portugal Ricardo Martins became a researcher at Porto UniversityÕs Underwater Sys- tems and Technology Laboratory in 2005, where he is the chief software architect in charge of the software used in all of its autonomous vehicles. In co- operation with the NATO Undersea Re- search Centre, he also develops software to improve underwater acoustic commu- nications and DTN. He has consulted the Portuguese Navy on autonomous vehicles since 2008. Email: [email protected] the authors Figure 4 Communications among autonomous sys-tems was accomplished by running DTN protocols via a MANTA communications hub on the deck of the coor- dinating ship.October 201238 MTRMTR #8 (34-49).indd 38MTR #8 (34-49).indd 3810/3/2012 11:59:49 AM10/3/2012 11:59:49 AM