Signal invests $40m in Orange, TX shipyard; Building ATBs currently for Kirby Ocean Tranporation Co. A ubiquitous presence in the Gulf of Mexico ship construction and repair market is Mobile, Ala.-based Signal International, a Marine and Fabrication company which employs about 1800 in its four production facilities across Alabama, Mississippi and Texas. Signal specializes in new construction, ship repair, and rig repair. Signal can handle marine construction and repair needs with three dry docks…