7-92J1 B
 Which of the following statements concerning SITOR (NBDP) communications is true?
A. In ARQ, each character is transmitted twice, about 250 milliseconds apart.
B. In ARQ, the "information sending station" will transmit a block of three characters that the receiving station will subsequently acknowledge or request be retransmitted.
C. In ARQ, the "information sending station" transmits a block of three characters twice, about 250 milliseconds apart.
D. SITOR (NBDP) communications can be used to contact a NAVTEX transmitting station when requesting a repeat transmission of a missed NAVTEX message.
