0

9                                                               3

                                             6

Mag.N(?)

0=37°52′54″N 121°54′51″W

3=37°52′54″N 121⁰54'48"W

6=37°52′48″N 121°54′51″W

9=37°52′54″N 121⁰55'W

(?)

Radian(?)

Mag.N

0=37°52′54″N 121°54′51″W

3=37°52′54″N 121⁰54'48"W

6=37°52′48″N 121°54′51″W

9=37°52′54″N 121⁰55'W

All these are arc(?)

From point on circle's arc to centre point(?)

9  0  3 are on the same plane(?)

     6      (?)

9  0  3

    6

(?)

Centre point at between 9,0,3,6(?)

9  0  3

    Coordinate(?)

     6

(?)

9 0 3

    6

(Use deepseek to calculate the coordinate that is radian of these four coordinate that spend time for 976 seconds (16 minutes) to do this 

9 0 3

37°52′51″N 121°54′49.5″W

    6

=37°52′51″N 121°54′49.5″W

But don't match the numbers of Zodiac Killer's Mt.Diablo map code maybe the solution is:

37 52 54 121 54 51

37 52 54  121 54 48

37 52 48