This is the Field Ops # 14 so here is a tour of it!
1.Talk to Gary and accept the Mission
2.Go to the Ice Berg and get near the Ice Berg's large pointy ice on the top left corner then click your phone.
3.Solve the puzzle and then earn your medal!
Hope you had fun!Also you can get a Stamp for doing this mission.By the way if you had more then 1 stamp in the past you automatically earn it,