Capt. Michael Davanzo, commanding officer of the Coast Guard Cutter Polar Star, outlines the cutter’s recent Antarctic mission on a chart during an interview with KPIX while the cutter is in a Vallejo, Calif., dry dock facility undergoing depot-level maintenance prior to the cutter’s next patrol, April 16, 2018. The crew of the Seattle-based Polar Star was recently in Antarctica in support of Operation Deep Freeze 2018, the U.S. military’s contribution to the National Science Foundation-managed U.S. Antarctic Program. U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi.