Lt. j.g. Kristina Robertson, a member of Coast Guard Port Security Unit 312, swims with her tactical gear and integrated flotation device during a water-survival training on Coast Guard Island in Alameda, California, Jan. 11, 2019. PSU 312 servicemembers spent the day in and out of the pool testing their equipment over and over again in order to earn their qualification needed to wear tactical inflatable side pouch personnel flotation devices which are compatible with their law enforcement gear. U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi.