general_dynamics_electric_boat | parentcompany | general_dynamics <tsp> american_submarine_nr-1 | shipbeam | 38 m <tsp> american_submarine_nr-1 | builder | general_dynamics_electric_boat <tsp> general_dynamics_electric_boat | locationcity | groton_connecticut <sep> general dynamics electric boat (gdeb) is a subsidiary of general dynamics corporation it has been the primary builder of submarines for the united states navy for more than 100 years the company's main facilities are a shipyard in groton, connecticut, a hull-fabrication and outfitting facility in quonset point, rhode island, and a design and engineering facility in new london, connecticut 
the american submarine nr-1 has a ship beam of 3.8 m and was built by general dynamics electric boat. general dynamics is the parent company of the general dynamics electric boat co which is located in the city of groton. connecticut.company's main facilities are a shipyard in groton connecticut and a design and engineering facility in new london, connecticut