By Petty Offcer 3rd Class Cindy Beckert Petty Officer 2nd Class Robert M. Kroll, a boatswain’s mate from Coast Guard Station Mayport, Fla., and a Keystone Heights, Fla., native, was still awake when the call came in after midnight. Early Sunday morning Station Mayport crewmembers had just responded to one false-alarm distress call and were getting ready for bed when the second call came in. var...