This was a letter to me I found under the comment segment of this blog today. I thank the writer for making my day. Dear Riana, I was the Signals NCO for Group 30, later Sector 30 in Otjiwarongo in 1978 and 1979. On the Ccommando radio network the Tsumeb Commando call-sign was 91, Outjo 81, Grootfontein 61 and so forth. Early in 78, returning from patrol near Etosha, one team's unimog crashed. The radio batteries were completely empty, so the signaller made a fire to warm up the batteries enough to get one whisper of a signal out to call for help. He sent out an sos which we picked up at our HQ, but the signal rapidly decreased in strength as the batteries burst of power faded, and the coordinates in slidex only your Mother could hear. And relayed to us, this was enough to find and recover the patrol. This alerted us to the unique atmospheric situation at your family farm, (We could sometimes even hear New York City taxi cabs! when we came over) So we cut several antennae for the different frequencies, and after testing various cuts and yagi's found that nothing beat the inverted "V" that mother used. We kept 91 as your Mother's call-sign for all networks, a large security risk, but really, your mother need no callsign, her voice and character were identification enough! Your family deserves a monument in stone, but let me assure you, you have a monument of memories based on all the warm recollections of your family and the gratefullness for all the lives and misery your family has spared. For this we thank you. Steffen Gentis October 2, 2012 11:11 AM