The U.S. Coast Guard medevaced an injured crewmember from a dive support vessel about 17 miles south of Pecan Island, Louisiana, on Friday evening.Coast Guard Sector New Orleans watchstanders were notified at 8:15 p.m. Friday that a male crewmember in his 30s, aboard the dive support vessel Ms. Kerci, reportedly sustained severe injuries to the leg. Watchstanders coordinated the launch of a Coast Guard Air Station New Orleans MH-65 Dolphin helicopter aircrew to assist…