Using the hairline, connect 280 mils on the right hand scale with
60 seconds in the Flash-to-Bang column.
Read the KT yield from the left-hand column where the hairline
The yield is approximately 50 KT.
b. Stabilized Cloud-Top Height or Cloud-Bottom Height.
Cloud-top or cloud-bottom height, when stabilized, can be closely measured
by an observer in an aircraft. If cloud width or angles cannot be measured,
the use of tactical aircraft for this purpose may be justified.
Measurements (in meters or feet above the surface of the ground) should be
made at approximately 10 minutes after the burst.
c. Stabilized Cloud-Top Angle or Cloud-Bottom Angle.
Figure 1-4 is used to determine yield from distance-to-ground zero (or
flash-to-bang time) and either stabilized cloud-top angle or stabilized
cloud-bottom angle measurements. The right-hand scale gives the flash-to-
bang time in seconds on the left side and distance in kilometers to ground
zero on the right side. The center scale is the cloud-top angle or cloud-
bottom angle, measured in mils on the left of the scale and in degrees on
the right of the scale. The left-hand scale is actually two scales. On the
left of the left-hand scale are listed the yields to be read when using
stabilized cloud-bottom angle measurements; on the right of this left-hand
scale are listed the yields to be read when using the stabilized cloud-top