RELEASE AND RECORDER RECORD B4-3 
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in the station. This chart willbe broughtto the attention of all assistants, 
who will be informed that severe burns and even death, can result from 
coming in contact with these wires, or from allowing the radiosonde 
train to come incontact with the wires while still holding the radiosonde. 
It will become the duty of officials incharge at stations where raob work 
is inaugurated to inform all who might be involved of the dangers in- 
herent in disentangling radiosondes from high-tension wires. 
3.3 Release Procedures. Make a rapid visual check of the train and 
radiosonde. The battery should be connected fora minimum of two min- 
utes before the release. Turn the recorder (selector) switch to receive 
the radiosonde signal. Check that the chart or paper drive switch is in 
the ON position. Tune the receiver if necessary and check that a steady 
trace of the circuit corresponding to the contact setting is being received. 
(AF) Place the AUTO-PRINT switch in the down position. When the ob- 
server at the recorder is satisfied with the operation of the radiosonde, 
he will request a clearance from the control tower. Then either the ob- 
server or the control tower operator will give the prearranged release 
Signal to the observer with the radiosonde. If there is no control tower, 
the observer at the recorder willindicate that the release may be made. 
3.4 Marking the Release. When there is an observer at the recorder, 
one of the following two methods will be used to mark the release. 
a. The observer at the recorder will mark the recorder record 
by turning the recorder switch to recordat zero momentarily 
just prior to release, and then back to the position of signal 
record at the exact moment of release. He will also turn the 
AUTO-PRINT switch to the ON position at the moment of re- 
lease and will note the time the release was made. 
b. The observer with the radiosonde may mark the point of re- 
lease on the recorder record by grounding the reference lead 
until the moment of release. The observer at the recorder 
will turn the AUTO-PRINT switch to the ON position at the 
exact moment of release and will note the time release was 
made. 
If only two observers are on duty at a station, and both are required to 
make the release, the recorder will be turned on to receive the signal, 
as indicated in §B4-3.3, before the observer leaves the recorder. The 
observer handling the balloon will note the exact time of release, and 
when he returns to the recorder, he will place the controls to their 
normal flight recording position. The surface level on the recorder 
= i=@6G FMH#3 
