2   5  7   11    16    21        31        41
    - --- -- ---- ----- ----- --------- --------- ------
   |X|   |  |MDIN|     |     |         |         |      ...
    - --- -- ---- ----- ----- --------- --------- ------
       |  |   |     |     |        |
       |  |   |     |     |        |_(4)-(9)6 Coefficients (6F10.0)
       |  |   |     |     |
       |  |   |     |     |_(3)Column number in the coefficient matrix (I5)
       |  |   |     |
       |  |   |     |_(2)Row number in the coefficient matrix(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 keyword indicates that the drag force on this structure is to be calculated as Morison hull drag using the coefficients specified.

(2)-(3) Row number and column number of the coefficients. These entries are interpreted as follows:

(a) Row and column number zero or omitted: The 6 values are assigned to the lead diagonal.

(b) Row only specified: The 6 values are assigned to the specified row.

(c) Column only specified: The 6 values are assigned to the specified column.

(d) Row and column specified: The value of C is assigned to the specified row/column. The coefficient C must be in columns 21 - 30.

The default fluid velocity U is relative steady fluid velocity for translational freedoms, i.e:

U(translational) = U(uniform + current profile) - U(structure)

U(rotational) = -U(structure)

These default values can be changed by using the MDSV data record (see below).

The current velocity used is always that at the center of gravity. The DDEP and DPOS data records have no effect on this drag calculation.