Hi , My daughter's father works for royal carribean internation as engineer with a C1D visa . He also has a B1/B2 visa . He is signing off his ship

A C1/D visa presents the situation where the individual is in transit in the US (C-1) to join the ship (D). That does not appear to be your daughter's father's intent when he enters the US. As he has a B-1/B-2 visa, he can explain his situation to the immigration inspector at the airport when he arrives. I believe that he would be admissible under the B1/B2 visa for the purpose that you described.Due to the limitations of the Lawyers.com Forums, Alan Lee, Esq.'s (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.