First, an apology. I only caught this message as of today July 2008. I see the reply was in 2005. The message from "Ol'uncle Bob" is partly right. Corrections are as follows:
1. Coast artillery WAS called Coastal Artillery very early. In 1901, the Field Artillery was split into Field and Coastal Artillery. Shortly thereafter, it was renamed Coast Artillery.
2. Sawicki DOES make mistakes. He states the 891st AAA was an AW battalion. I found out in Carlisle Barracks, PA, the Center for Military History a resource called Unit History Cards in microfilm that lists the history of units active. The 891st AAA WAS a gun battalion. I ORDERED the history of the 891st AAA gun Battalion from the National Archives and it is listed as a Gun Battalion. The Unit History cards DO list the 767th as a GUN BATTALION and not as an AW battalion.
3. Both the official history of the 762nd AAA Gun Battalion (available from the National Records and Archives Administration) and the official history of the 891st AAA Gun Battalion (available from NARA as well) state that "continentals were to be replaced by drafted Puerto Ricans" and that "antiaircraft defense in Panama will be left to drafted Puerto Ricans." Continentals were those whites or Hispanics born in US with native English speaking skills. These continentals, to use the words used in the histories, were replaced by Puerto Ricans and transferred out except for a few left as a cadre for training.
A. Digger did not state when the person started service in the 767th. My guess is that her or his relative left sometime during the life of the 767th. As the 767th was inactivated in Panama, I would say it was composed of Puerto Ricans. I cannot check my photocopy of the Unit History Card as it was stolen, but I think it DOES mention it was going to receive drafted Puerto Ricans.