The SS and FBI place 4 shots in and around Z313 - just not Z313

[Chris Davidson]

The attachment is from Tom Purvis.

The term "flat-line distance" refers to the distance from the (bottom of the TSBD snipers nest, out to the designated point of bullet impact on Elm St).

Or, in terms of the right-triangle diagrams previously provided, the "Base a" measurement.

chris

More from Tom Purvis regarding shot#1.





This flat-line distance equals JFK's position in extant zframe 207. If you look closely, it was labeled very lightly on the 1963SS/1964FBI plat.

Approx 123ft. from Zapruder is extant Z207.

The difference between extant frame 207 and the shot1 designation on the SS/FBI plat is 10.2ft.
Those designations equate to Station# 3+71.1 and 3+81.3
TomP. stated that the location of the X#1 on the plat, did not change between the SS created plat in Dec 1963 and the FBI revised SS plat of Feb 7, 1964.

The pylon, is supposed to represent (shot1-JFK's position within the limo) in the SS recreation video could not have been positioned to represent either of the above shots. See previous pylon placement..
That pylon which is somewhere near the extant z235 frame equals Station# 3+96.8
The difference between the limo front and JFK's position in the limo is 15.25ft.
The difference between these 2 locations would put JFK's position at Station# 3+81.55
This gets you quite close to the X#1 mark on the plat at 3+81.3
chris