Originally Posted by
phlpsfrnk
Not sure why the hang-up with "line of sight" however the statement "operator of a radio-controlled model aircraft shall control it during the entire flight, maintaining visual contact..." seems pretty clear to me. At the time this was written the 550 buddy box rule had the PIC/spotter on the primary control which would be in compliance with the current FAA interpretation.
Frank
Oh, sorry, guess I didn't make myself clear. I was curious about the source for the use of VLOS in section 336 of the modernization act. Poor SP was really distraught about it, because it apparently is synonymous with an engineering term. So I wanted to see what congress used as a source. Seems to still be a mystery to me.