F-class
From PigBoats.COM
Design, Construction, and Naming Notes
The F-class were coastal patrol submarines designed by the Electric Boat Company (EB) of New York City (later Groton, CT.) They were built by two different yards: F-1 and F-2 were constructed at Union Iron Works of San Francisco. F-3 and F-4 built at The Moran Company of Seattle, the first submarines built in the Pacific Northwest.
