Right side profile, high angle view of a U.S. Coast Guard HH-65A Dolphin Helicopter as it sits atop four feet of sea ice on McMurdo Sound, Antarctica in support of the National Science Foundations scientific research. Footprints in the snow, are seen leading away from the aircraft and out of the frame at the bottom of the image. It regularly supplies the U.S. Coast Guard icebreaker POLAR STAR (not shown) with mail, cargo, and passenger transit