098E D
 You receive a Routine DSC call to your vessel, without specifying an alternate working voice frequency & emission. Your transceiver frequency display reads: 2177 kHz transmit 2177 kHz receive. What must you do?
a) Tune the transmitter and make a voice call to the other vessel on 2187.5 kHz.
b) Access the data directory to determine the alternate frequency and then make a voice call to the other vessel on the alternate frequency.
c) Manually Acknowledge the DSC call on the alternate frequency, then make a voice call to the other vessel on 2182.0 kHz. 
d) Call other vessel on 2182.0 kHz and shift to a proper working frequency. 
