2-37. Authentication is mandatory when a station suspects __________ __________,when it is
not operationally desirable for the __________ station to __________, when directing a station
to __________ an imposed __________ silence, when transmitting a __________ message in the
__________, and when transmitting in the __________.
(2-37. Answer: imitative deception, receiving, reply, break, radio, classified, clear, blind)
SS0652
2-14
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