Ship waypoints (WP) and/or route plan report

Introduction/Additional information: 

This IFM should be used by a ship to report its waypoints and/or its route plan. If the reporting ship uses this IFM 17 within an addressed binary message, then the waypoints and/or the route plan will be available to the addressed recipient, e.g. VTS or other ship, only. If the reporting ship uses this IFM 17 within a broadcast binary message, then the information will be available to all other AIS stations in its vicinity.

When transmitting a route plan the transmitting station should include up to 14 next waypoints (NWP), if available, and/or a route specified by a textual description, if available. The next waypoints should be transmitted in the order of the intended passage.

Registrant: 
ITU-R.M.1371-1
Message number: 
6
DAC: 
1
FI: 
17
State: 
deprecated
Number of slots (max): 
5
Permitted as from: 
01/01/1998
Details: 

 

  Number of bits  Description 
NWP  4 Number of next waypoints available (1-14);  0 = no next waypoint available = default; 15 = not used 
WP i.Lon  28 Longitude of next waypoint i in 1/10 000 min (±180°, East = positive, West = negative). Field required if and as often as 1 ≤ i ≤ NWP, i = 1, 2, 3, ..., 14;  field not required if NWP = 0 
WP i.Lat  27 Latitude of next waypoint i in 1/10 000 min (±90°, North = positive, South = negative). Field required if and as often as 1 ≤ i ≤ NWP, i = 1, 2, 3, ..., 14; field not required if NWP = 0 
Route specified by textual description  120 Description of the route information in textual form, e.g. —West channel“; maximum 20 characters using 6-bit ASCII; @@@@@@@@@@@@@@@@@@@@ = not available (field must not be omitted) 
Spare  NWP  Bits  Spare. Not used. Should be set to zero 
  0, 8  4  
  1, 9  5  
  2, 10  6  
  3, 11  7  
  4, 12  0  
  5, 13  1  
  6, 14  2  
  7 3  
Number of bits  128-896    The number of bits of the IFM 17 may be calculated as follows: 124 + (NWP × 55) + spare 

The number of slots used for this message depends on the number of next waypoints transmitted as
follows:

 

 Number of next waypoints   transmitted   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
 Number of slots used for this   message   2 2 2 3 3 3 3 4 4 4 4 5 5 5 5