however, when she and her sister tugs joined their squadron at hampton roads, virginia, there were already six other smaller vessels on its rolls designated "picket launch no. 1" through "picket launch no. 6". great confusion resulted and prompted the navy—sometime between 1 november and 5 december 1864—to rename the former "fred wheeler" and her five sisters for the first six letters of the greek alphabet – "alpha" through "zeta".