One of four female rescue swimmers in the Coast Guard is jumping into another challenge: becoming the next American Ninja Warrior. Truthfully, said Aviation Survival Technician 2nd Class Jaime Vanacore, she is just going to have fun at the game show’s Baltimore tryouts, which are scheduled for Friday and Saturday. “It was a spur of the moment thing,” she said. The rescue swimmer said she was not familiar with ANW, but when her sister told her she should try out for the show’s fifth season, she started looking at YouTube videos and thought it looked like fun. “I was shocked,”…