 In February–March, in company with and , the submarine tender supported operations in the Gulf of Panama as the submarines attempted to "defend the Canal Zone" in war games against the Battle Fleet.In April, the Commander, Submarine Division, Pacific, transferred his flag from "Camden" to "Beaver".The tender then joined SubDiv 16, consisting of six of the new S-boats, and escorted them back through the canal and on to San Pedro, arriving there at the end of the month.