Marga McElroy, Erich Horgan, left, and Alexi Shalapyonok plan a dive program to redeploy Rob Olson and Heidi Sosik’s in situ flow cytometer at the Martha’s Vineyard Coastal Observatory during R/V Tioga’s first science cruise in April 2004. Others in the photo are ships’ crewmembers Ken Houtler, center, and Dave Olmstead. (Photo by Tanya Swann)

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