IALA

Tidal window

 Parameter  No. of bits  Description
 Message ID 6  Identifier for Message 6;  always 6
 Repeat Indicator 2  Used by the repeater to indicate how many times a message has been repeated.
0-3;
0 = default;
3 = do not repeat anymore
 Source ID 30  MMSI number of source station
 Sequence Number 2  0-3.
 Destination ID 30  MMSI number of destination station
 Retransmit Flag 1  Retransmit Flag should be set upon retransmission:
0 = no retransmission = default;
1 = retransmitted.
 Spare 1  Not used. Should be zero.
 IAI 16 DAC = 001;
FI = 14
 UTC month 4  1-12;
0 = UTC month not available = default;
13-15 not used
 UTC day 5  1-31;
0 = UTC day not available = default
 Position #1 Lat 27  1/10 000 min (±90 degrees,
North = positive,
South = negative;
91 degrees = not available = default).
 Position #1 Lon 28  1/10 000 min (±180 degrees, East = positive, West = negative; 181 degrees = not available = default).
 From UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 From UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 To UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 To UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 Current direction predicted #1 9  Current direction in degrees. ( valid range 0-359, 360 = not available = default).
 Current speed predicted #1 7  Current speed in 0,1 knots. (valid range 0-126;  127 = not available = default).
 Position #2 Lat 27  1/10 000 min (±90 degrees, North = positive, South = negative;  91 degrees = not available = default).
 Position #2 Lon 28  1/10 000 min (±180 degrees, East = positive, West = negative;  181 degrees = not available = default).
 From UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 From UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 To UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 To UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 Current direction predicted #2 9  Current direction in degrees. ( valid range 0-359, 360 = not available = default).
 Current speed predicted #2 7  Current speed in 0,1 knots. (valid range 0-126;  127 = not available = default).
 Position #3 Lat 27  1/10 000 min (±90 degrees, North = positive, South = negative;  91 degrees = not available = default).
 Position #3 Lon 28  1/10 000 min (±180 degrees, East = positive, West = negative;  181 degrees = not available = default).
 From UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 From UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 To UTC hour 5  0-23;
24 = UTC hour not available = default;
25-31not used
 To UTC minute 6  0-59;
60 = UTC minute not available = default;
61-63 unused
 Current direction predicted #3 9  Current direction in degrees. ( valid range 0-359, 360 = not available = default).
 Current speed predicted #3 7  Current speed in 0,1 knots. (valid range 0-126;  127 = not available = default).
 Total number of bits   376  occupies 3 slots