9D17 B
 When a telex call is initiated over the INMARSAT system, the channel used is:
A. An idle channel chosen by the scanning device of the ship Inmarsat radio.
B. A common channel shared by many ship stations.
C. One of three channels a ship is assigned by Comsat and dedicated only for calling.
D. Time division multiplexed on any busy channel with an idle time division channel selected by ship's equipment.
