To use the calculator, rotate the outer disc until the known flash-to-
bang time aligns with the known cloud parameter information. The arrow
will then point to the estimated yield on the edge of the center disc.
Estimated yields calculated on the M4A1 calculator will be within plus or
minus 2 KT of an estimate using the nomogram method.
Figure 2-7.
M4A1 Nuclear Yield Calculator, Back
2-11
CM2307