This visa is afforded to crewmen serving in good faith in any capacity required for normal operating and service on board a vessel.
This includes people employed by the owners or concessionaire and trainees.
The nature of the employee's duties, when those duties are performed and whether the employee has a permanent connection with the carrier and whether his/her employment is required for the vessel's operation are factors that are considered in determining whether an employee is entitled to D visa status.
There are two types of this visa category, individual D visas and crew list visa. There are also D-1 visas (which apply to crews on all types of carriers except U.S based fishing vessels) and D-2 visas for USA based fishing vessels temporarily visiting Guam.
The period for admission on this visa is 29 days.