Before Boulderjohn knew me, I was the person he asked to check this out for the research into the NSS-CDS inquiry. The day I checked, the perch was at 50' and the water level wasn't high at all.
To provide a further explanation:
During my investigation, I was not near High Springs, and I asked Superlyte27 to go to the ear and tell me what he could see from several depths. I also asked him to describe the water level at the time. I was unable to determine the water level at the time of the incident for comparison.
I realize some readers will not have thought through the issue enough to tell what difference the water level would make, so I will make a brief explanation. The entrance to the cave system known as the ear is nearly straight down for a while and then makes a sharp turn as it levels off. The straight down part is called the chimney. If you are in the chimney at a certain point--where the turn occurs--you can see clearly all the way to the deco log easily. If you are a couple feet below that, you can't. What is the depth of the turning point where you can still see? It varies, depending upon the depth of the water. Superlyte27 determined that, depending upon the depth of the water, it would have been possible to see all the way to the log at the time of the incident from the depth indicated.