Got this from B. Smith, link pretty well tells what planes the ARC-3 was in. Interesting. Rod KØEQH -----Original Message----- From: B. Smith [mailto:smithab11 at comcast.net] Sent: Thursday, March 04, 2010 1:49 PM To: Rod Hogg Subject: Re: [Milsurplus] ARC 3 / T 67 questions http://www.designation-systems.net/usmilav/jetds/an-ara2arc.html