NBC 1 (Nuclear) Report
Nuclear Burst Data Collection.
Whether you are a designated observer or an alternate unit observer, there
is a recommended sequence for obtaining nuclear burst data.
At the instant of the "blue-white flash," hit the ground facing away from
the burst. Start counting slowly - 1000 and one, 1000 and two, and so on
until arrival of the shock wave or bang.
Remain in position, preferably
under cover, until the shock wave arrives and continue counting one more
After passage of the shock-wave and the bang, read your watch and observe
the developing cloud.
Record the count (seconds) on which the shock-wave
and bang arrived at your location (letter item J).
Also record the time
(local or ZULU) of the burst (letter item D).
If you observe a thick dense stem connected to the mushroom part of the
cloud, record "SURFACE" as letter item H. If the stem is not connected to
the mushroom part of the cloud, report "AIR." Should you not be able to make
a positive determine, report "UNKNOWN" as letter item H.
If you are able to observe ground zero (GZ) determine the coordinates of GZ
and record them as letter item F.
If you cannot observe GZ, measure the azimuth from the observer's location
to the center of the stem or mushroom cloud. Enter this azimuth in mils or
degrees as letter item C.
Complete letter item B and submit the initial nuclear burst report (NBC 1).