C1D to USA b1b2 visa

Client Profile: He is a resident of Karnataka. Is a Ship crew by profession. Had a C1/D expired in 2013. Wanted to visit USA for tourism purpose. His appointment letter had expired and did not specifically state about his continuation.
He said that whenever he is due to join they give him a call and then give the contract letter. This time he was asked to join on 27th March 2015 but he excused himself.
Appointment Date :  Mar 2015
Medium : English

VO : Good Afternoon ! Your Passport please ?
HD : Good Afternoon (with smile because he was not expecting the officer to wish him first) (hands over the passport).

VO : So here is a C1/D Visa. May I see your appointment letter ?
HD : As per AVS training

VO : Oh I see. Which Company are you working for ?
HD : I am working for xyz, USA as a crew.

VO : Since how long are you working there ?
HD : Since last 5 years.

VO: How long do you plan to stay in the USA ?
HD : Not more than 15 days as I have to resume work on 27th April 2015.

VO : Congratulations ! Your Visa has been approved.
HD : Thank you so much Sir.

 

AVS US Visa Agent Comments: If you want to convert your C1D visa to B1B2 visa you should undergo professional training to ensure that you can eplain VO on purpose of your VISIT to USA