I would like to suggest that when posting in the forum and an abbreviation is used, such as OA, LOS, IPS, it is spelled out the first time it is used in a posting. For example, "LOS". For those of you who have been doing this for years it is obvious what the poster is saying but for the new forum reader it may not make sense. Could it mean "loss of signal?" If we were to copy the scientific journal format one would say ... line of sight (LOS) .... the first time the term was used and .... LOS ..... thereafter. A subsequent poster could do the same if desired but would not necessarily be necessary as the reader would have already encountered the term in a previous posting. It takes but a second and I suspect would be appreciated.