015D B
 Which of the following statements concerning MMSI is true?
a) Coast station MMSI numbers have 9 digits starting with 4. 
b) All MMSI numbers are 9 digits and contain an MID. 
c) Ship station MMSI numbers can be 7 digits or 9 digits depending on the Inmarsat terminal. 
d) Group MMSI numbers must begin with 2 zeros. 
