Re: Gropac 4 Acorn 22
Fred, don't know anything about the outfit, but these definitions found online:
comments powered by
GROPAC - A commisioned Naval advanced base unit designed to install and operate harbor and waterfront facilities and to provide certain harbor defenses for an advanced base.
Acorn - An airfield assembly designed to construct, operate and maintain an advanced landplane and seaplane base and provide facilities for operations.
Also, this web page should be of interest to you ("Acorn 22" is in listed there):