Can we use H4 to enter and exit US through water or air?

[ramavarun]

Hi Friends,

My husband is working as chief officer in ship, he has a valid H4 visa.
I have a valid H1B, I heard that if he get H4 is C1D will be cancelled is that true?
If so an he use H4 to join ship from US water lines.
He s not going to work in US, he is just going...

[ramavarun]

Hi Friends,

I have a valid H1B, now planning to apply H4 for my husband.
My husband is a chief officer in ship and already have a valid C1D, Can he apply for H4 now?
If he get H4, will his C1D get cancel or he can hold both visa?
He requires both H4 (to stay with...