7R-39F5 B
 Which information determines if a NAVTEX message is to be rejected?
A. Transmitter identity (numerals from 1 to 26 identifying transmitting station within the NAVAREA).
B. The second letter (from A to Z) in the header indicating the type of message.
C. The Answerback of the receiving station has not been entered in the NAVTEX receiver.
D. Only messages having a serial number 00 are rejected.
