2   5  7   11    16    21        31        41
    - --- -- ---- ----- ----- --------- --------- ------
   |X|   |  |MDSV|     |     |         |         |      ...
    - --- -- ---- ----- ----- --------- --------- ------
       |  |   |     |     |
       |  |   |     |     |
       |  |   |     |     |
       |  |   |     |     |_(3)Finish freedom number(I5)
       |  |   |     |
       |  |   |     |_(2)Start freedom number(I5)
       |  |   |
       |  |   |_(1)Compulsory Data Record Keyword(A4)
       |  |
       |  |_Optional User Identifier(A2)
       |
       |_Compulsory END on last data record in data category(A3)

(1) This data record may (optionally) be used in conjunction with the MDIN data record to change the value of the relative fluid velocity used in the calculation of the Morison hull drag. It specifies that the structure velocity only is to be used for translational freedoms. For example,

MDSV     1     2    

will cause structure velocity only to be used for X and Y freedoms.