10 0 No report
21 1 Previous position
32 2 Present position
43 3 30 nautical miles
54 4 60 nautical miles
65 5 90 nautical miles
76 6 120 nautical miles
87 7 150 nautical miles
98 8 180 nautical miles
109 9 More than 180 nautical miles
1115 15 Missing value
12