folks found this interesting report. history and status of the u.s. marine radiobeacon system 1982. link https://apps.dtic.mil/sti/pdfs/ADA125461.pdf Jeff N2IA -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20230108/11348e1a/attachment.html>