| Which of the following statements concerning SITOR communications is true? |
| A) In ARQ, each character is transmitted twice, about 250 milliseconds apart. |
| B) In ARQ, the "information sending station" transmits a block of three characters twice, about 250 milliseconds apart. |
| 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. |
| D) SITOR communications can be used to contact a NAVTEX transmitting station when requesting a repeat transmission of a missed NAVTEX message. |
