Estimated Lock Times Message (Seaway)

Registrant: 
Saint Lawrence Seaway Development Corporation
Message number: 
6
DAC: 
316
FI: 
2
State: 
in force
Used by: 
Saint Lawrence Seaway Development Corporation
Number of slots (max): 
3
Reporting Rate: 
Each individual Seaway message has an assigned update interval established by the Seaway Traffic Management System (TMS). However, the AIS network may elect to retransmit any messages, system resources permitting, at more frequent intervals.
Permitted as from: 
09/03/2002
Technical point of contact: 

U.S. Department of Transportation 
John A. Volpe 
Transportation Systems Center
55 Broadway 
Cambridge, MA 02142

Details: 

 

 Parameter    Number of bits    Description  
Designated Area
Code
10 The Designated Area Code will be 366 for the United States or 316 for
Canada depending on the location of transmitter.
Refer to Section 1.1 for description

Function Identifier

6 FI=1
Reserved   2   
Message ID   6 Message Identifier = 2 (00 0010 in binary)  
Timetag 20 Month, Day and Time of Message,
Vessel Name 90 15 character vessel name in 6 bit ASCII
Last Location 42 7 character identifier of last location in 6 bit ASCII
Last ATA 20 See table below 
First Lock 42 7 character identifier of first lock in 6 bit ASCII
First Lock ETA 20 See table below 
Second Lock 42 7 character identifier of second lock in 6 bit ASCII
Second Lock ETA 20 See table below 
Delay 42 7 character identifier of the first lock which currently has a vessel being
delayed
Reserved 4 See table below
Total Number of Bits 366 (3 Slots)

UTC Time

 Parameter    Number of bits    Description  
 Month   4  Month of year (01- 12 Month);  0 = not available;  13-15 not used  
 Day   5  Day of month (01 - 31 Days);  0 = not available  
 Hours   5  UTC Hours (0-23);  24 = not available; 25-31 not used  
 Minutes   6  UTC Minutes (0-59); 60 = not available; 61-63 not used  
 Total number of  bits 20