ココ・ソロ
The craft of Submarine Division 1 sailed from New London on 2 October 1922 for Coco Solo. "R-21" served as flagship as the boats cruised via Hampton Roads and Guantanamo. After 11 days out, "R-24" developed engine trouble and was temporarily taken under tow by "R-21". The Cuba-bound steamer SS "Bethore" rendered assistance, and "R-21" arrived at Coco Solo on 27 October.