a98 Chirp & Down Vision view of bottom

I went to FAQ and I have copied and pasted examples below
in example 1,
Chirp, at 100' the area on the bottom I am looking at is a 44.34' area?
Which would be similar to the traditional to the view of a 50Khz?


Example #1 CHIRP (conical) sonar cone base diameter at depth:
.... cone base diameter at 100' depth = 0.4434 * 100' = 44.34'


For the examples below, at 100' the area at the bottom I am looking at is 1.' ft wide and 115.4' long?


Example #2: DownVision side to side axis dimension at depth:


DownVision side to side axis dimension at depth:100' = 115.4'

Example #3: DownVision fore to aft axis dimension at depth:

.... fore to aft axis dimension at 100' depth = 0.01222 * 100' = 1.222''