This restriction has been established to avoid the possibility of an accidental pointing error causing too much light to fall upon an instrument.

BBC: Close up on Mercury

Linder made the disclosure today, saying that Gingrich's false statements were accidental, due to an error by the lawyer, Jan Baran.

CNN: Gingrich Gave False Information To Ethics Committee

Coroner Rob Turnbull said the crash was due to an "error of judgement" and recorded a verdict of accidental death.

BBC: PC Andrew Bramma death: 'Error of judgement' led to crash