U31 class construction side by side at GW
The 11 U-31s were constructed nearly side-by-side at GW. Here, U-37 and U-38 are in the company’s Slip 5, while U-25 and U-26 are in Slip 4 in the background. Despite the work en masse, the class was delivered an average of six months later than scheduled due to delays in the construction of the GW-made engines.