Visa Qerry

Respected Sir/ Madam, My name is Avadhut Shinde, working in US based cruise line, Princess Cruises. Presently working on Pacific Princess ship. This ship visiting Vietnam in April 2010 and my wife and son Both are Indian and holding Indian Passport, We are arriving via ship and we will be there only for one day. Do my wife and son need a visa to go ashore??? please advise me so that i can take necessary step to apply for visa and also if you can send me embassy address in India i will be very grateful to you . As per your website there is no Vietnam embassy in India. Where i can apply for Visa and where i have to send their passport eagerly waiting for reply, thanks very much for your great help. Yours Faithfully Avadhut Shinde