Dr. Anson Hines, by Ploskonka, Jeffrey, 1986, Smithsonian Archives - History Div, Dr. Anson Hines of the Smithsonian Environmental Research Center (SERC) uses a directional hydrophone to track an ultrasonically telemetered blue crab on the Rhode River. This investigation used ultrasonic telemetry to record the patterns of movement and habitat of the Atlantic blue crab, a commercially and biologically important denizen of the Chesapeake Bay. The research was carried out by Hines in collaboration with Dr. Thomas Wolcott, a professor in the Department of Marine, Earth and Atmospheric Sciences of North Carolina Sate University, Raleigh..