Crab,
Question for you......"What is the minimum height above ground must one be in a single engine helicopter (that includes multi-engine aircraft flying on a single engine for any reason) to be able to determine a safe landing area should the sole remaining engine cease operation suddenly without any warning?"
Follow up question....."What constitutes a "safe landing" in an emergency situation under discussion (sudden engine failure)?"
Last question.....Must the aircraft suffer no damage....occupants no injury however minor....no harm to people on the ground....and finally....no damage to property on the ground to include trees, bushes, sod or power lines?"
We all need some commonality of definition here so we can talk about apples and apples.....rather than apples and oranges.