d. Two or More Observers Reporting Flash-to-Bang Time.
To determine the location of GZ when two or more observers report their
location and both report a flash-to-bang time but no azimuth, plot the
observers' locations on the map. You then determine the distance to GZ
based on the flash-to-bang time using the nomogram (Figure A-2, page 3,
Supplemental Booklet) or the mathematical method.
Using a drawing
compass or a piece of string measure the distance to GZ on the Graphic
Scale of the map.
From each observer location draw an arc at the
computed distances. GZ is considered to be at the point where the arcs
intersect (Figure 1-4).
Intersection of Two Flash-to-Bang Times