Shipbuilders at Maine’s Bath Iron Works will soon learn whether they’re getting a critical contract. The Navy has told Sens. Susan Collins and Angus King of Maine that it intends to issue a contract for 10 Arleigh Burke-class destroyers by June 4, with work to be completed over five years from fiscal 2013 through 2017. The fact that the Navy is moving forward is considered a positive sign. Collins says the contract would have been in jeopardy under a long-term continuing resolution on the budget and that a Bath win would mean job security for shipyard workers. King says Bath is a strong competitor on the project.