Navy Petty Officer 3rd Class Ryan Doherty, right, and Navy Petty Officer 2nd Class Paul Dattoli prepare to conduct an underwater pier survey with divers assigned to Underwater Construction Team 2 in Apra Harbor, Guam, Dec. 14, 2017. Doherty and Dattoli are divers assigned to Mobile Diving Salvage Unit 1. Navy photo by Petty Officer 1st Class Arthurgwain L. Marquez