27.17.1. The TPRV Data Record - Tether Printing Interval

   2   5  7   11
 - --- -- ---- -----
|X|   |  |TPRV|     |
 - --- -- ---- -----
    |  |   |     |
    |  |   |     |_(1) Number of steps (I5)
    |  |   |
    |  |   |_Compulsory Data Record Keyword (A4)
    |  |
    |  |_Optional User Identifier (A2)
    |
    |_Compulsory END on last data record in data category (A3)

(1) Enter a non-zero integer 'N' where listing file time history output for tethers is required every 'N' timestep.