Which of the following statements concerning SITOR communications is true?

Correct Answer: Option C — In ARQ, the "information sending station" will transmit a block of three characters that the receiving station will subsequently acknowledge or request be retransmitted.

Under USCG National Maritime Center examination standards, the accepted correct answer is: In ARQ, the "information sending station" will transmit a block of three characters that the receiving station will subsequently acknowledge or request be retransmitted..