Water Flow Message (Seaway)
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 = 6 (00 0110 in binary) | |
| Binary Data | Max 864 | Message contains 1 to 6 water level reports, each structured as defined in next table. | |
| Total Number of bits | Max 888 | = 24 + N*144 | |
| N Total Bits | (Slots Required) | ||
| 1 168 bits | (2 slots) | ||
| 2 312 bits | (2 slots) | ||
| 3 456 bits | (3 slots) | ||
| 4 600 bits | (4 slots) | ||
| 5 744 bits | (4 slots) | ||
| 6 888 bits | (5 slots) | ||
Water Flow Report
| Parameter | Number of bits | Description |
| Timetag | 20 | Month, Day and Time of measurement, See UTC Time |
| Station ID | 42 | Seven 6-bit ASCII character ID |
| Longitude | 25 | Longitude in 1/1000 minute (±180 degrees, East = positive, West = negative. 181 degrees = not available) |
| Latitude | 24 | Latitude in 1/1000 minute (±90 degrees, North = positive, South = negative. 91 degrees = not available) |
| Water Level | 14 | Water flow in cubic meters per second (16383 = Not Available) |
| Reserved | 19 | Reserved bits for future use |
| Total Number of bits | 144 |