Petty Officer 2nd Class Bill Glenn, an electronics technician and member of the military dive team aboard Coast Guard Cutter Polar Star, pilots a remote operated vehicle inspecting the propeller of the disabled fishing vessel Antarctic Chieftain near Antarctica, Feb. 14, 2015. Video from the ROV is used to evaluate damage sustained by Antarctic Chieftain. Polar Star's crew has been underway in Antarctica in support of Operation Deep Freeze 2015, part of the U.S. Antarctic Program, managed by the National Science Foundation. (U.S. Coast Guard photo by Petty Officer 1st Class George Degener)