14.11. The DDEP Data Record - Depth for Current Measurement

When calculating the current hull drag on a structure, this data record defines the global height at which the current is measured.

      2   5  7   11    16    21         31        41        51        61
    - --- -- ---- ----- ----- ---------- --------- ---------
   |X|   |  |DDEP|XXXXX|XXXXX|          |         |         |
    - --- -- ---- ----- ----- ---------- --------- ---------
       |  |   |                   |
       |  |   |                   |_(1) Reference height
       |  |   |
       |  |   |_ Data Record Keyword(A4)
       |  |
       |  |_Optional User Identifier (A2)
       |
       |_Compulsory END on last data record in Data Category (A3)

(1) This is a vertical position in the FRA. When calculating the hull drag force on the structure using coefficients defined on the CU** data records, the current at this point will be used.

Note:

  • The drag force is still applied at the center of gravity.

  • This is a fixed height in the FRA.

  • The current used is the total of uniform + profiled current.

  • This data record does not apply to Morison-type hull drag using coefficients specified on the MDIN data record.