She was commissioned by the self proclaimed explorer, Charles Templeton Crocker, to a design of Garland Rotch, and built by Nunes Brothers Boat and Ways Co. as a vessel for sailing around the world with all the modern conveniences of the time.

[1][2] Due to the need for local patrol and rescue craft in the busy waters in the San Francisco area during World War II, the schooner was acquired by the Navy from Templeton Crocker on 12 June 1942.

Eventually relieved by the frigates (PF's) of Escort Squadron 41, Zaca was placed out of service at Treasure Island, California on 6 October 1944; and her name was struck from the Navy list on 13 November 1944.

Turned over to the War Shipping Administration on 21 May 1945, Zaca was acquired in 1946 by Errol Flynn, an actor famed for his "swashbuckling" roles in numerous movies.

A skipper and crew of four regularly sail Zaca to ports such as Punta Ala, Gaeta, Capri, Cagliari, and throughout the Aegean Sea.