Which of the following statements concerning SITOR (NBDP) communications is true?
In ARQ, each character is transmitted twice, about 250 milliseconds apart.
In ARQ, the "information sending station" will transmit a block of three characters that the receiving station will subsequently acknowledge or request it to be retransmitted .
In ARQ, the "information sending station" transmits a block of three characters twice, about 250 milliseconds apart.
SITOR communications can be used to contact a NAVTEX transmitting station when requesting a repeat transmission of a missed NAVTEX message.
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