When Cmdr. Roger Meyer led the attack submarine Miami on a successful five-month deployment in 2010, he couldn’t have known he’d be the last commanding officer to take the boat on patrol. But a May 2012 fire set by a worker at Portsmouth Naval Shipyard in Kittery, Maine, effectively ended the Miami’s service life. Despite a 10-hour effort to battle the blaze, led by Meyer, it would’ve cost $450 million to repair the sub — an expenditure that the Navy decided in August wasn’t worth it. Instead of 10 more years of service, five more deployments and a handful more…