089B B
 During SITOR ARQ operations through a coast station, what should the GMDSS operator do during the "Automatic Exchange of Answerbacks"?
a) Send a "WRU" then a "Here is" when requested by the coast station.
b) Do nothing other than wait for a GA+? prompt.
c) Send the necessary message file and then wait for time and charges.
d) None of the above
