THE BLAST ESTIMATE OF ZODIAC

In respect to the Mount Diablo code, the Zodiac Killer gave us two clues to where his bomb was to be set, in the form of two crosshairs on July 26th 1970. The first crosshairs contained a bold, black circle positioned at 4 radians and magnetic north around its circumference. Next to this circle, the Zodiac Killer placed SFPD=0, indicating the target was a San Francisco Police Department. The second crosshairs were overwritten with the wording "P.S. The Mt. Diablo code concerns Radians + # inches along the radians". The hashtag (recognized as a number sign) was positioned above a pointing arrow, beckoning us to insert a number value before inches. The answer is five inches, because this is the only value that falls over San Francisco from Mount Diablo using the map scale of 6.4 miles to the inch. The bomb was to be set alongside Ingleside Police Station, on an embankment bordering the Southern Freeway. For further explanation in simplified form, please visit here, or for more extensive coverage read the article The Answer to the Mount Diablo Code.

Bearing in mind the wording "P.S. The Mt. Diablo code concerns Radians + # inches along the radians", it is clear that the code very likely contains both radians and inches in the answer. It can only be 4 radians (set to MagN), because no other radian value falls over San Francisco. The same reasoning can be applied to five inches. My solution to the 32 character code was once "Radians and 5 inches along the radians", to be coupled with the map supplying the radian value of four (set to MagN). The crosshairs of 4 radians and magnetic north when positioned on the map give us a 246 degree line away from Mount Diablo, traveling a distance of five inches (32 miles). Ingleside Police Station is actually 4.08 radians and 4.84 inches from Mount Diablo, so the Zodiac Killer was rounding off his values and giving us an estimate. Druzer, an excellent Zodiac researcher, sent me a solution incorporating all these components, that not only satisfied the 32 character code length, but married up the only three repeating characters in the code with corresponding letters. Set to magnetic north, the estimate of four radians and five inches was alongside the Southern Freeway, just 274 feet from Ingleside Police Station (SFPD =0). 

                     ESTIMATE: FOUR RADIANS AND FIVE INCHES 

Footnote: Ordinarily radians would be measured counter-clockwise, but the Zodiac Killer gave us crosshairs superimposed over Mount Diablo with an arrow pointer set in the north facing position, "to be set to Mag. N". He allocated it a zero position, with a 3, 6 and 9 in the form of a clock face around its circumference. This was to instruct us to travel clockwise around the circumference of the crosshairs in this instance. Which is why it was no fluke that the bold, black circle fell exactly at 4 radians and magnetic north.

The Blast Estimate of Zodiac (Part Two)