What is a C-4/D-3 visa ?
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The C-4/D-3 visa combines the C-4 visa, which allows noncitizens to travel to the US to join a lightering vessel, and the D-3 visa, which allows noncitizens to work on those ships. Lightering is the ship-to-ship transfer of liquid cargo.
C-4/D-3 visa holders can stay in the US for a period of 180 days or less.
The State Department does not maintain a cap on C-4/D-3 visas.
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