Production. Submarines. On the shores of America's inland waterways, many underwater crafts are being constructed. This submarine is undergoing finishing touches in a small bay at Manitowoc, Wisconsin

Production. Submarines. Construction of the hull section of a submarine at Manitowoc, Wisconsin. These sections will be assembled in a small bay, and when completely installed will be sent through the Saint Lawrence Canal to the sea

Production. Submarines. Gaining practical experience after months in the classroom, a young naval ensign confers with a foreman on the conning tower of a submarine under construction at Manitowoc, Wisconsin

Production. Submarines. Men of America's army of production. The nation's underwater craft are being launched in record time because of men like these two who work on a construction crew at the Navy's shipyard in Manitowoc, Wisconsin

Production. Submarines. Installation of an engine part in a submarine under construction at Manitowoc, Wisconsin

Production. Submarines. Mounting submarines on scaffoldings facilitates assembly. Here a worker rivets parts of the hull together

Production. Submarines. As the shift changes, workers pour out of the shipyards at Manitowoc, Wisconsin, where submarines are built on a twenty-four-hour day, seven-day week basis

Production. Submarines. Before gasoline rationing, in a Midwest shipyard's parking lot. Today, this same view would probably show fewer cars, as workers all over the country have formed car pool clubs to save tires and gasoline

Another harrier of the U-boats nears completion at an eastern boat yard, Marine Construction Co., Stamford, Conn. Many new 110-foot wooden sub-chasers are taking the water these days at yards in all parts of the country