Overheating problems with a test motor being developed Navy’s next nuclear ballistic missile submarine has not thrown the “no-margin-for-error” program off-schedule, senior service leaders have told Congress. Testifying Tuesday before the House Armed Services seapower and projection forces subcommittee, Rear Adm. John Tammen Jr. said the problem, discovered before the motor arrived at Philadelphia “consumed considerable flex time” in the program. But “the risk is manageable and well in hand,” Rear Adm. Michael Jabaley, program executive officer for submarines, added. Last week before the Senate Armed Services strategic forces subcommittee, Navy nuclear programs director Adm. James Caldwell said “it required … Continue reading Navy to Congress: Columbia-class Submarine Program Still on Schedule with Little Margin for Error